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My 2006 pontiac grand prix failed smog test for obd systems check. What does this mean and how do I fix it? The shop said the check engine tests says not ready

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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keemo68
  • 1263 Answers

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

Posted on Sep 23, 2008

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odiebugs
  • 949 Answers

SOURCE: 2000 Saturn SL2 fails smog due to failure of OBD Self test

Some vehicles require very specific drive cycles (called "drive traces" if you perform them on a road simulator or dyno) to activate certain self-checks like the catalyst and EVAP monitors. As a general rule, doing some stop-and-go driving around town at speeds up to about 30 mph followed by five to seven minutes of steady 55 mph highway speed driving will usually set most or all of the monitors. Consequently, if you're checking an OBD II system and discover that one or more of the monitors have not run, it may be necessary to test drive the vehicle to set the remaining monitors.

You should talk to a good emission tec, if this is not throwing a code, it is hard to say if that one of the components could be bad. O2,pump,convert, HeO2, every part of the emission system.

With a 1000 miles, and doing what is says above just before the test, and ending driving at the test
should be plenty. If it is not, you will have to have each emission part checked, or when the computer
is plugged in it might show a code that did not trip dash light.

Posted on Mar 27, 2009

rockitman187
  • 2559 Answers

SOURCE: 1997 Pontiac Grand Prix Evac Canister Pressure to low

Check hoses for cracks and holes at the pictured locations
84c815b.jpg 0387102.jpg d29077b.jpg 55c4546.jpg

Posted on May 26, 2009

  • 1 Answer

SOURCE: 2003 Toyota Camry Se V6 has a check engine light

I had the same problem, then took my car to an expert repair shop who diagnosed the sensors and
found no problem with the car. They notified the DMV who was unaware of the problem, who then told the repair shop (John's Bascom Automotive) that they will adjust their computer system to allow a "two speed idle test". My bill was $95 and I still have to pay for a smog test after driving around for
a couple of days to clear the computer monitors, a fair amount and I gladly paid it.

John advised me that I'd get no satisfaction with Toyota or the DMV. I went to the dealership where I
bought the car and they said that the smog stations don't know what they're doing. They charge
about $100 and work around the P0500 code but it takes them about two hours to do this. I told
them that I should have been notified about the dyno none-compatability by Toyota and that Toyota
should have notified the DMV beforehand. I wonder how many speed sensors are being replaced by
unknowing smog shops around the state. I got Toyota's main customer support phone number and
will call them Monday. I'm going to get my pound of flesh ($95 worth) from the DMV next week also.

traderralph

Posted on Jun 26, 2009

iambanshee74
  • 3489 Answers

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.

Posted on Dec 29, 2009

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Definition of P0420 is catalyst below threshold. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). Catalytic converters are not normally a "wear" type item, that is they are not deisgned to wear out and need replacement. If they have failed, it is likely due to something else that caused it to fail.

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Your vehicle is equipped with an OBD II computer AND a link to connect OBD II computer to a Smog Check Analyzer or Data Scan Tool (available
at most auto part stores).There are two types of codes, bad codes and good codes. The good codes are the "Readiness Flags". These Readiness Flags
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My 2006 grand prix was repaired so that it could pass the e-check but when I took it in they told me that the system has not reset


Put a professional scan tool on it & see what I/M Monitors
haven't run yet,maybe they never fixed ALL the issues

I fault the shops for giving you back a car they know won't
be accepted at inspection & expect you to drive it forever
& it be your problem

I road test all vehicles with scan tool software for 50 miles
if have to, until the 8 monitors run clear & it WILL pass inspection

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During phase 2, only the AIR pump is activated. The solenoid valve is closed, this is p2430 and p2440. -The AIR system pressure sensor is stuck. good-day !!

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2006 pontiac grand prix 3.8 supercharged, check


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1997 Pontiac Grand Prix Evac Canister Pressure to low


Check hoses for cracks and holes at the pictured locations
84c815b.jpg 0387102.jpg d29077b.jpg 55c4546.jpg

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