965 Olive Drive , Ste. H .
Next to AAMCO, near Redrum Burger
1.7 miles from DMV
Mon-Fri 8:30am-5:30pm
Saturday By Appointment only between 9am 2pm. Call ahead pls. And Closed on major holiday weekends
(530) 757-2995
Aggie-Smog.com — $15.00 Coupon
Facebook page
BAR License Number
Jasen Singh
March 2008
Payment Method
Cash, Check, Visa, M/C, Discover.

Aggie Smog is a "SMOG STAR Certified Station" smog testing and licensing company on Olive Drive. Owner operated and open five days a week and by appointment only on Saturdays, they do: Star Certified smog inspection, all vehicles including diesels, Star Certified Smog test only certification, test only smog inspection, smog check required, out of state vehicles, gross polluter, change of ownership smog inspections, initial inspection, fleet services.RV and Motor homes as well.

They offer one free retest if your vehicle happens to fail the initial smog inspection (with proof of repair). You can be in and out in just 15 to 20 minutes depending on year make and model, while you wait in a clean waiting room. They also perform smog inspections on diesels.

They have a coupon here on the wiki: Aggie Smog 3-08[1] with phone#.pdf. Look for $15.00 Coupon in Consumer Guide Magazine, consumer-guide.com and Little Green Coupon Machine, also call for special pricing. They do not charge extra for 1995 or older vehicles that require to go through low pressure evap test which went effective Dec 1st of 2007. For Pre-1995 vehicles, an evap test is free.

They also offer student and senior citizens discounts, and accept competitor Test Only smog coupons for the Davis area. Call for details.

Our goal is to Keep California Smog-Free.


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Note: The following two reviews were posted from the same computer by new accounts created only to add these reviews. While this does not invalidate these reviews, it does call them into question.

2008-03-02 20:43:28   I went at this place visible distance from redrum burger.He doesn't rip you off like other places and his price for smog is right.Honest and very efficient guy.He is the owner and smog technician, they open on sundays also.I will have my other two cars smogged at this place mate. —lewinsky

2008-03-04 22:21:43   Had my truck smogged here today and he was very pleasant,neatly dressed took care of me.It took him about 15 to 20 mins to smog my truck while i was waiting.Their waiting room is so clean and you can walk to the park towards downtown while he is doing the smog inspection.He even explained me how clean was the emissions coming out the exhaust of my old truck. —prethy

2008-03-13 16:15:52   The service was fast. I went to In and Out and back and it was done in around 15 minutes. The price was reasonable and he even offered a free retest if my car failed (it had failed a smog test previously). The offer for a free retest sealed the deal, since the last place that failed me would charge again. —GraceAn

2008-03-19 09:55:06   I have an older vehicle that runs on propane. I took it to a couple of places and they told me that they couldn't smog it! I asked them why and they said that they had never done it before and didn't want to attempt it either. I then took it to Aggie Smog and he got it done in less that 20 minutes! —Taz

2008-03-24 03:31:56   I got my car smogged here a couple days ago. It's a one-man operation, and the owner/technician is very friendly. I like to support small businesses, and the price was reasonable too. In addition to getting 10$ off using the coupon listed here, I also got an additional student discount. The owner is a great guy, and I would recommend Aggie Smog for a reasonably priced and quick smog check. —mrchau

2008-04-06 13:19:06   I just got back from Aggie Smog and I am pleased. I'm new to this whole "smog check" requirement, so I decided to try out this place cause its new. Jasen was really nice and helpful and he gave me a student discount on top of the $15 off coupon. I highly recommend this place, I dropped off my car and walked around downtown. Less than 25 minutes later I got a call that it was done. Very professional and quick. —BrandonBarrette

2008-04-15 23:27:07   I got my car smog tested here and I was very impressed. I called ahead of time to see whether he was busy or not. He finished in under 15 minutes. I will definitely go back when I need to get my car re-tested. —AmandaAbughosh

2008-04-20 12:43:08   this guy is courteous, fast, and friendly. OPEN on Sundays —matt31

2008-05-10 10:40:32   This is the only place to go in Davis for test-only smog checks. Jasen is extremely courteous and takes the time to explain your test results or, in the case of the person before me, what to have fixed before you come back for a free retest. Jasen also doesn't charge extra for the new evap test on pre-95 cars. I've been to all the other test-only businesses in Davis and found the employees to either be indifferent or just plain rude. —mchevy

2008-05-23 15:16:08   I went on a Friday morning and only had to wait about 30 minutes, then my car was done. There was only one person there waiting when I came in. The technician, who I think was the owner as well, was very polite. The waiting room is small, but clean and comfortable. Check their website - I found a $15 coupon there which they happily accepted. —MicheleTobias

2008-06-24 13:50:21   I went to Aggie Smog on a Tuesday to get my truck smogged, and there was no wait. He is polite and honest, not to mention extremely quick. Only 15 minutes and I was on my way! I highly recommend him. —bjb2455

2008-07-09 20:00:27   I went here yesterday and was out of there in 20 minutes, and Jason honored the $15 coupon and gave me the student discount. Very pleased. —MatthewPearson

2008-07-13 15:25:16   I was a bit skeptical about all the positive comments I saw here. I decided to take my Lexus RX300 here for a smog test. It turned out to be a disaster, 25 minutes into the test Jason came back and told me that the car can be not tested due to transmission problem. My car drives fine and I did not experience any shift problem. I took my car to advance auto for smog test and the car passed the test without any transmission problem. The tech told me that my car has a non-disengageable 4-wheel drive. A two speed idle test should be performed instead of putting it on the dyno. I was shocked and hoping that my car is not damaged in any way due to Aggie incompetency. This guy sure does not know what he is doing......don’t be fools by the reviews on this page. Take your car to a experience shop! This guy is dishonest, why denied the facts. I will never take my car there. Advance auto sure knows what they doing, they will always have my bussiness. Why all the positive and no negative comments? This guy is a fraud! He writes his own reviews and posted them under different alias.


2008-07-14 08:11:27   To whoever posted the last comment.Firstly i never came across a RX300 vehicle that i had a problem smogging.I do know that 4 wheel rx300 does have non-disengageable traction control,therefore TSI test has to be performed.I have smogged alot of vehicles like this.My records show i have not written any invoice showing a rx300 vehicle coming to the shop in the past 3 weeks.Maybe this person does not like seeing all this positive comments.I am the only smog tech in this shop who has never come across this issues. —jasen

2008-07-14 10:39:36   Went here mainly because its a small shop, and I know what its like trying to be in business for yourself. I took in one of my project cars. The Tech, was very helpful and very fast. He explained what I need to do to get my car to pass, and said to bring it back after I fix the problems (almost there) to re-test for free. This guy is good. I'll bring all my cars to him in the future. —Aaron.Curtin

2008-07-28 16:44:15   Attention to all readers of these reviews and existing and prospective customers of Aggie Smog - I am writing this in regards to the negative comments posted by "rjohal". After reading his reviews, I can definitely tell that this guy knows what he's talking about, considering all those technical terms that one would never hear from their smog tech. I know for a fact that he is either a smog tech himself, working for Advance Auto repair, which is right across from Aggie Smog, or he is just one of Jason's relatives who is jealous of Jason's success in his business and cannot mind his own business. Think about it - he's the only person who left a negative review here, and he's saying don't be fooled by the reviews on this page! Hello! There's a 12:1 ratio here! RJohal is the fool himself! I also know for a fact that he will come back to this page to answer back to anyone who has replied to his post, just like he did on 2008-07-19 12:31:59. Get a life, you loser! —Taz

2008-08-01 13:04:27   After reading all the positive comments I thought I'd give this place a try. I recently bought a Jaguar XJ8 and took it over to Aggie Smog for the emmisions test. The process took him approximately 15 minutes while I went to grab some coffee around the corner. When I got back he had all the paperwork ready to go and even explained to me what the data means. He also offered some preventative maintenance tips that would help me keep the vehicle in great condition. Not too many people give advice without something in return. After that experience I decided to take my 1992 Toyota Tercel to Aggie Smog. I explained to him that I was donating the vehicle to my brother. According to the Jasen, it did not require a smog check since the transfer was within the immediate family. That is the type of integrity all businessmen should show. A lot of places would have performed the test and charged me for it, knowing that it was not required. Heck, half of them probably wouldn't be aware of the fact that it was not required.

This guy is an A+ business man and knows the value of his customer base. He is on top of his game plan and a step ahead of the system. The business is easy to find and has many amenities nearby. Fast, honest and reliable service that you can count on. Keep up the good work Jasen. —Jagxj8

2008-08-07 08:57:39   According to the website, the prices for cars and pick up trucks are $66.75 plus $8.25 for the certificate. With the $15 coupon, that's about the same price as everywhere else in Davis. —TinaBorjas

2008-08-25 16:28:41   I decided to give this place a shot after hearing all the good things from my friends and family. As they had stated everything was correct!! I was really surprised by the whole experience, I didnt think a a new business like this could be so up to date and on top of that have a worlds best customer service. As I drove up to the shop I was greeted by Jasen and he asked what he could help me with. As he kindly told me to wait in the the waiting room and I helped my self to some water and candies he pulled my car in and started the diagnostic tests. After about 15-20 minutes he came in and told me that everyhting looked good and my 2000 maxima had passed!! he explained to me briefly what he had done and what the results meant. I felt like I was in a doctors office accept being scared..lol.. Jasen is very knowleable in the smog business he knows what he is doing. I loved the whole experience and not forget his shop is located in the heart of Davis, very easy place to get in an out of. I really liked his honesty and his friendly business skills "kuddos" to you jasen. I had a wonderful expereince and cant wait to take my other family cars to him and I cant wait till my 07 Yukon is eligible for smog check so I can hand over to a tech who knows what he is doing and not feel scared but feel very comfortable like family... —SRangee

2008-09-11 15:17:34   Just got a smog check on my 95 Honda Civic. Cost with coupon was $60, and it took 18 minutes. I'm very satisfied. —BrendanConnors

2008-10-13 18:02:00   i brought my 94 mercedes c280 in today and he was very clear and fair about the smog test. everything was taken care of in a quick fashion. overall great service. A+ —noogooyen

2008-10-14 11:18:41   Jasen was extremely friendly and efficient. There was only about a 15 minute wait and the waiting room is really nice. I just took my 1991 Corolla for a smog inspection and I would recommend Aggie Smog to anyone. —jesstar

2008-10-31 13:21:18   Got my car smogged here. went to prove the good reputations and they were all true ;-). —superdavis

2008-11-25 09:24:26   I just took my 2003 CRV to get smog checked here, based on the good comments on the wiki. I had a great experience! It took about 15 minutes. I walked over to Borders for a coffee and the owner called me on my cell phone as soon as it was done. With the coupon the price was $60. Friendly service. Highly recommended. —SuzanneM

2008-12-12 16:19:00   Prompt service, reasonable rates, clean and courteous. Excellent! —DonShor

2008-12-22 17:11:13   I don't usually leave comments, but this time I will. Overall, the guy is fine: does his job fast and clean. However, I don't think he is any different from the rest of the guys that are out to get your money. I came in for a smog check having my engine light on and asked him what are my chances of passing. He replied that it all depends on the system, but in the end my car failed due to my engine light being on, and as it turn out this is one of the first things they check. So, why do you say that it depends on the system if you know that when the engine light is illuminated - the car automatically fails smog? In the end I asked him if I could just clear the codes and come back, but he told me to get the car repaired and then come back for a retest, otherwise, according to him, I won't pass. Apparently, I've been around cars longer than he has, as I went home, cleared the codes, drove to the nearest smog check station and PASSED. NO mechanics, NO extra expenses on unnecessary repairs.

The conclusion is as follows: If you don't have any problems with your car - this guy isn't better or worse than any other smog shops. Otherwise, find yourself another shop, cause Jasen will send you spending you money for no reason. —bayer044

2008-12-23 13:38:55   Very well said,the last comment here.The smog inspection is a valid test the reveals why your vehicle failed overall smog inspection,in your case check engine light that is part of visual and functional obd tests that is done half way of the the tests.That tests are determined visually and functionally by communicating with the vehiles ecm/pcm to check for any stored codes,or unsuccessfully completed obd 2 monitors.If your vehicles has failed that process,yes it fails the overall inspection.This is part of the test.We as a smogtest only station have to direct any failed inspection to any licensed smog and repair station so that it is diagnosed and repaired right.Vehicle owner can also do the repairs themselves if they want to and have it smogged again to pass the overall smog test.In your case you just cleared the codes and drove it to nearby smog station and it passed,but you did not diagnose or found the cause of the problem that is triggering that check engine light.Chances are the check engine light will come on if the it is not diagnosed or repaired the right way. In conclusion we smog test only stations only do official smog inspections,we do not diagnose or repair any emissions-related repairs on vehicles.We refer motorists to specific test and repair facilities. Here we offer a free-retest within 30 days if your vehicle fails the initial smog inspection. —jasen

2008-12-30 14:54:41   They were super helpful in figuring out what was wrong with my car, and the guy that works there is really cute. —FloridianPlywood

2009-01-17 11:44:07   Very fast and efficient service. Took 10-15 minutes. Guy was very polite and checked my coolant FREE OF CHARGE,(this place does not do repairs, so there was no motive)and gave suggestions as to what I should do. Wonderful service, I would definitely recommend this place to anyone! —KMeo

2009-01-29 12:19:40   I had a good experience here. The technician/owner seems like a nice guy with a good attitude. Service was quick. He was recommended by a mechanic I trust, Bob Redfield. —Cedric

2009-02-10 09:07:41   Just to follow up with some comments here regarding check engine light on.Once the smog inspection is in progress and when it comes to inspect a vehicle for visual and functional test,the results has to be entered either pass or fail on any emission controls.On obd 2 or 1996 and up cars a functional test is performed where the analyzer reads codes,monitors from the vehicles pcm and commands a pass/fail under that functional tests.If you are not sure if your car will pass or fail with the check engine light on when at the smog station ask the tech ahead if you have any doubts regarding such issues.It is up to you if you want the tech to go ahead and do the smog inspection. Test only stations do not diagnose or perform emission- related repairs.As a driver/owner of a vehicle,when you see a check engine light on on the dash panel it is your responsibility to have the car diagnosed at a repair station or if the owner can do it himself if he is capable.In conclusion if your vehicle has a check engine light on have it checked out before going for a smog check.Smog test is a ca official test,not a grade one spelling test. This site is always helpful and will answer alot of questions http://www.arb.ca.gov/msprog/obdprog/obdfaq.htmjasen

2009-04-21 17:34:20   Very nice and friendly guy. Charged $60 because I was a return customer. Highly recommended. —patco

2009-05-20 15:30:58   Just had a straightforward and generally pleasant experience here today. Called ahead to see what the wait was like (two people waiting, might be half an hour), dropped off the car then walked over to the gym to burn an half an hour or so. Car was ready sooner than expected and the gent behind the counter was polite and answered several procedural questions I had. —KevinChin

2009-06-12 14:35:28   Came in, filled out some paperwork, used the $15 coupon, waited 15 minutes tops for my car. I didn't pass because of a loose part in the engine, but the owner (Jason) explained and pointed it out. He also gave me a list of possible repair places. Came back when I got it repaired, didn't pay for the 2nd smog test except for the passing certificate. I'll recommend this place. —strawberry

2009-07-21 19:30:00   I had a great experience with this place! I was in the process of selling my car, and just needed the smog before I could finalize the deal. I'd never had a car smogged before, but the guy working there, Jason, made it really simple for me. After I failed my initial test (it's a really old car) he recommended a few things I might try to fix it up a bit in order to get it to pass. They give a free retest within 30 days of failing the first one, and I'm happy to say that my car finally passed, and I just sold it. The test was relatively cheap (compared to other prices in Davis) and fast, and he was very helpful. I'd recommend him to anyone needing to get their car smogged. —buss013

2009-07-22 16:26:28   took my 99 yukon with 200k+ miles here, I was in and out in 20 minutes. great service. with the consumer guide $20 off coupon it was $57 even! Great service, fast, good price, and a passing smog cert!!! —Carsonsig

2010-03-07 09:40:46   I tried to go here, but they aren't good about keeping hours on the weekends. I tried going on Sat 2/20 around 2pm and found a sign saying they were closing that day at noon. Tried again yesterday (Sat 3/6) at around 3pm and they were closed. Noticed on the sign that they are open the 1st and 3rd Sundays of each month, so I tried again this morning (3/7) at 9:15am. Closed again, so I went to EZ smog (which was open). Sorry Aggie Smog, you lost a customer. —Dani

2010-03-07 09:46:42   Doing what I said I'd do, removing Vlam's ad hominem comment. —JimStewart

2010-03-07 11:02:16   I thought this page would be a snarky comment on the smog in Davis like the Essence of Davis page :)

(I know there's no smog in Davis which is why it would've been even more humorous!) —AlexanderHo

2010-03-08 15:42:08   Dani....I am so sorry about 3/6/2010.I had to close early that day around 2:30pm.I had to attend a funeral.There was a note on the left side of the window.We don't open on sundays anymore.Once again i apologize for inconvience. —jasen

2010-03-09 13:27:53   First class smog testing service. I was in and out in about 15 minutes. It cost only 55 bucks with coupon, friendly mechanic, oh, and a passing smog certificate. I would recommend this place without hesitation, unlike another Davis test facility off F and Covell where the mechanic laughed at me when I told him I'd driven for a while to warm up the car. Not sure what I find funnier - the fact the other place lost my business, or that they didn't get the chance to fail my car based on what would have been erroneous readings if I'd brought it in cold. Anyway, go with Aggie Smog - there's no reason to go anyplace else. —MelDraper

2010-04-27 12:57:18   I went here yesterday during my lunch break, because I got a recommendation from Jon at Triple A Automotive. He was definitely right! The guy who runs this place was very friendly and nice. He smoged my car in about 15-20 minutes while I ate my lunch in the office. He also took the time to answer a bunch of questions I had afterwards. Highly recommend this place, and will be returning next time I need to. —JessicaAdams

2010-05-20 09:31:12   I would recommend that you call before going. We tried to stop by on a Wed. at 3:30 and he was closed with a sign saying he would re-open the next day. —RachelD

2010-08-11 09:11:24   The hours on wiki say 8-6 and the hours on their website say the same. I can't remember what the shop says, but the sign definitely says 8am and might say open until 6pm, but it might also be 5:30pm. Anyway, I went there at 5pm on a Monday and they were not open for some 3-day span. Fair enough. But I went in the day after that span was over at 5pm and the place was closed up and dark with the CLOSED sign on. WTF?! So I went in the next morning at 8:10am and the same thing!! I asked the neighboring business if Aggie Smog was even still in business, since I was having serious doubts, and they said it usually opens at "about 9". Some serious business fail, there. Post your goddamn hours of ACTUAL operation already!! Anyway, such poor work ethic led me to take my business to another shop. —DanaMace

  • Sometimes it takes a gentle nudge to get things done. Unfortunately, many businesses still feel the Wiki is a tertiary priority, at best, which is sad since it has the ability to reach so many. However, after you comments, the owners apparently heard something and have posted new hours right here on the Wiki. Gentle nudging.. — Wes

2010-09-04 19:09:59   Excellent service as usual. Great advice for how to get our 1984 Toyota pickup to pass; we did it, it worked. And the price was reasonable. Thanks again Jasen! —DonShor

2011-05-06 15:10:28   I tried going here twice during business hours and they weren't open either time. The first time was a Wednesday about 40 minutes before closing (by the hours on the window, which state 5:00 rather than 5:30) and there was a closed sign, so I figured they'd just closed early and I'd come back another time. Today though it was 2:00pm and there was no closed sign - just a locked door and dark window. I tried calling to see if maybe someone was in or I could at least leave a message asking when they *would* be open, but the phone just rang. It doesn't seem like there's any answering machine, and I definitely had the right number since I could hear the ringing coming from inside the office, too.

Maybe I just had bad luck, but from the comments it looks like some other people have had this problem as well. —BrittS

2011-05-09 10:47:47   @ Britts-We had to close early because of some issues with the machine on thursday and friday.There was a note on the window.Sorry for the inconvience. —jasen

2011-08-15 20:34:51   Hands Down. Best place to get your car smog. I went to E-Z smog the first time because I didnt know aggie smog was closed on Sundays. I failed the first time due to NOx and timing/idle speed. Did my retest and still failed both NOx and idle speed and i know i adjusted the timing and idle speed... I didnt expect them to tell me anything because its a test only check, but i was hoping they'd tell me something to fix the problem. Then I went to aggie smog and right off the back I could tell Jasen was there to help you pass. Jasen helped me pass my timing check by simply putting a mark on the pulley because the machine couldnt read the degrees (something EZ Smog would have never done or even told me about). I still didnt pass smog due to my NOx, but Jasen told me the problem. He actually took the time to explain to me what needed to be done, something i doubt many companies would not do. Anyways to keep it short, I finally passed smog today and i couldnt have done it without Jasen's help. He definitely wants the best for everyone. You can't really beat that kind of customer service. Thank you Jasen!

btw. he help me a lot more than what was written above. —JohnE

2011-11-29 10:27:57   took my 21 year old truck to be smogged today at a required test only place. Jasen was friendly and took the coupon I printed from Little Green Coupon machine. I had to wait a day while his machine was being serviced. Whole procedure went very quickly. Most importantly, I PASSED!!!! I suggest calling ahead, as I did, to make sure the machine is ready. Will definitely go back when I need my smog done again in 2 years. —HeatherF

2011-12-08 16:29:56   Great place. Jasen is very nice. I showed him the printed wiki discount coupon, and instead of $10, I got $15 discount. Ten minutes later I had my car back and passed. I highly recommend this place and I will definitely go back again next year. —JeroenPost

2012-01-19 17:40:45   I came in last week during a break from class to get a smog test for my car. There were two other people ahead of me but I still was able to go in and out of the place in less than 30 minutes. The guy working there was very nice and gave me a student discount on top of the coupon I got from the Little Green Coupon Book. Great service. I would come again. —DMendez

2012-02-04 15:02:33   I really didn't expect my best customer service experience in memory to come from a smog check only place. He refused to take my money the first two times I went there because he visually inspected my car and knew it was going to fail. The first time because my check engine light was on which is apparently an automatic fail. He suggested it was likely an 02 sensor and it was. The second time was for a different reason that would take too much typing to explain. Anyways, I think most places would take my money even if they knew I was going to fail. The actual smog check itself took less time than I could walk across the street, eat a cheeseburger at InNOut, and walk back (15 minutes). —MikeyCrews #E0E0FF

2012-03-14 13:51:00   After reviewing all the comments on here I had my car done last month. Every great comment is true. I highly recommend Jasen's service and will go back there again in the future. —Salie

2012-06-25 10:29:06   Just had a great experience here. Professional and friendly. I will definitely come back with my other cars. Thanks! —EvaG

2012-06-29 16:43:17   In and out in less than 30 minutes with no appointment at 1:30 p.m. on a Friday afternoon. My car passed, and with the "Little Green Book" coupon plus DMV certificate my total was $55. Satisfied customer. —jsogul

2012-07-18 10:30:59   Had a positive experience here- in and out about 20 minutes, used the online coupon and also got a student discount. Wish I knew about the green machine coupon. —JaroldWong

2012-12-31 12:50:06   Two years ago got my smog done at Jasen's shop and he has done repairs on my car as well. So when smog was due again my first thought was to go to Jasen's shop and get it done since i liked the service provided and trusted him with my car. Today i walked out of his shop filled with disappointment and confusion. Jasen denied to service my car with NO Reason provided. I asked him why wouldnt he service my car? He said personal reasons. I found Jasen's behaviour unprofessional and rude. I believe that he should provide me with a valid reason and an apology. Just wanted to share my experience today with the returning customers and the future ones. —Ashe

Jasen was very helpful, and genuinely wants each car to pass. He provided very insightful advice and also gave me a second free retest when the number showed that we were getting close. I did a slightly older car and since I paid cash he gave me a discount. I'm pleased even thou Davis itself is in a smog2 standard zone. Daubert

2013-03-22 21:10:47   Best Place Ever! the guy is super nice and actually cares that you pass your smog check. He actually went out of his way to help fix and make sure i pass my smog check (even with 2 cars waiting behind me). Any other place would have just took my money and wouldn't care if i failed. This guy was very considerate and generous. This place really deserve good business. It was also very cheap too since he gave me a discount for being a student. —bobjonesbobjones

2014-03-10 18:09:47   First smog test in Davis- While my car actually passed the smog test, he failed me because of the check engine light. Honestly he was rude on the way in, and he could have just told me before charging $68 that he would fail me regardless. In other cities smog checks are cheaper, and they aren't out to fail people. He actually bragged that he failed three people that day. —JoeBruin

2014-03-11 07:53:41   The smog inspection is a valid test the reveals why your vehicle failed overall smog inspection,in your case check engine light that is part of visual and functional obd tests that is done half way of the the tests.That tests are determined visually and functionally by communicating with the vehiles ecm/pcm to check for any stored codes,or unsuccessfully completed obd 2 monitors.If your vehicles has failed that process,yes it fails the overall inspection.This is part of the test.We as a smogtest only station have to direct any failed inspection to any licensed smog and repair station so that it is diagnosed and repaired right.Vehicle owner can also do the repairs themselves if they want to and have it smogged again to pass the overall smog test.I follow inspections by the laws and regulations of state of california and intructions via inspection anayzler In conclusion we smog test only stations only do official smog inspections,we do not diagnose or repair any emissions-related repairs on vehicles.We refer motorists to specific test and repair facilities. Here we offer a free-retest within 30 days if your vehicle fails the initial smog inspection. —jasen

2014-08-28 17:29:27   I was unsatisfied with this business. Facts: I have a Jeep Wrangler YJ on 37's with a spring over lift. Original engine, exhaust (emmissions items stock). Gearing is changed to 4.88 so that final gear ratio with big tires is within 5% of stock gearing on stock tires. The owner refused to test my car because he believed the dyno would not work properly and "red flag" him. I explained to him the gear ratio is similar to stock. The newer laws require the RPM range to be similar to match the 15 mph and 25 mph dyno runs. He said I should put the stock tires back on...This of course would make the engine rpm be entirely out of range as the gearing wouldn't match the tire size! Conclusion - if you don't have a perfectly straightforward car to smog, do not go here. He does not have sufficient knowledge for anything out of the ordinary. I did go outside, walk across the parking lot, and make an appointment with advance smog. They tested the vehicle and it passed the same day by the way. —AHan

2015-12-07 01:20:25   $52 (with the Green Machine coupon) to get smogged; about twenty minutes waiting time with no appointment and no other car already being seen to (ie empty waiting room). Waiting room has a stack of magazines for perusal purposes and is reasonably comfortable. Dude at the counter was efficient and professional. —JaniceW