I fail my MA state inspection because the OBD works with the station and dealer computers, giving me a clear emissions check, but when they plug in the State Registry computer it fails on emissions. The only service light currently on is for the tire pressure monitoring system and I have been told that should not affect the inspection, especially the emissions test. Neither Minuteman (Bedford) nor Tracey (Hyannis) know what is happening.
SOURCE: Jetta failing smog due to non communication with OBD - Suggestions?
the no data error can be contributed to a bad interface cable or the scaqn tool was configured wrong and therfore could not connect to the ecm. I would recommend having a scan done again by a certiefied volkswagon tech chances are the mechanics used the wrong adapter cable or reader card. your smog problem could be that your evap canister is clogged therfore gives a bad reading.unfortunately you have to have a scan done but try an independant small shop that delas exclusively with foreign cars such as porche andd mercedez. the will have the correct scan tool and will be much cheaper than a dealership. your cost should be no more than 50 dollars US ... please rate this. thanks
SOURCE: Car failed inspection because of the check engine light
to ideas come to mind, maybe a bad bulb in the dash (you can take this out (depending on mechanical knowledge)
or find a smaller inspections shop and try taking the car in again in hopes of that they won't catch it
SOURCE: Emissions warning light came on. Car runs great
It may be the computer itself. If the light keeps returning, either the computer is faulty or the fans are really failing. I do not recommend dealers but actual mechanic shops.
SOURCE: My 2002 VW Jetta failed smog due to MIL/Check
if this vehicle is driven in the city almost exclusively, take it out on the freeway a good 30-40 miles prior to taking it back to the smog shop. that should prime all the readiness sensors. make sure your doing some speed and not just going 55 in the slow lane. get the system nice and hot.
Testimonial: "very helpful thank you!"
SOURCE: Failed state emissions test with codes P0171 &
Sensors are reporting that car is running to lean...Check sensors...
161 views
Usually answered in minutes!
To: vagman54.
Thx for responding. To clarify - are you suggesting that the Registry computer(s) is (are) not calibrated properly (kwp 1281) for the Touareg ? (It was my impression that the Registry units were standardized and locked to avoid fraud.)
Thanks again, I will pass this on to the tech.
nine
vagman54, thx again. I notice you are in UK and so may not be familiar with US emission test procedure. In Massachusetts, two computers are involved, the first is a regular code-reading computer (my OBD unit communicates with that computer at all four locations that I have taken the car to). The second is a state auto registry sanctioned machine that tests the emissions (this computer is on-site but not adjustable by the dealer) and my OBD fails to communicate properly with this unit at all four locations. Thus, the problem is almost certainly in my OBD unit but none of the techs has ever seen this situation.
Thx again; rew5
what i am suggesting is..if everybodys computer except the states can talk to your car it carnt be everybody elses computer that is wrong,especially the main dealers which will be specific to your cars programme....
your testing station computer is not talking the same as the other two computers it needes to be talking in kwp 1281 i believe,so there computer will shoe different readings !!!!
×