|
| Search | Car Forums | Gallery | Articles | Helper | Air Dried Fresh Beef Dog Food | IgorSushko.com | Corporate |
|
#1
10-08-2003, 07:32 PM
|
|||
|
|||
2001 Service engine light
Keep getting the service engine light after 25 miles. Have replaced a vent solenoid and the gas cap. Dealer cannot figure it out. Any ideas.\
Code has to do with the fuel system 
|
|
#2
10-08-2003, 09:10 PM
|
||||
|
||||
|
Re: 2001 Service engine light
If you can be more specific with the code, I'll try to help.
__________________
Why do you never have enough time or money to do the job right the first time, but enough time and money to do it again? Got all the certifications 25 years ASE Certified Master Technician GM WCT Yea..I work at a DEALERSHIP....got a problem with that? Want to diagnose cars like the Pros? FOR SALE: OTC Perception 2 channel Labscope (badged as a Matco Reality) This is my personal labscope that I use to diagnose waveforms, like new, comes with leads and training video PM Me for details
|
|
#4
10-10-2003, 07:34 AM
|
||||
|
||||
|
Re: service engine light
Unfortunatly there are about 6 or 7 codes dealing with the evaporative emissions system.
To run most of the evap tests, the fuel level must be between 1/4 and 3/4 and there are some other parameters that must be met. Knowing if it was a control code or a leak code would be very helpful.
__________________
Why do you never have enough time or money to do the job right the first time, but enough time and money to do it again? Got all the certifications 25 years ASE Certified Master Technician GM WCT Yea..I work at a DEALERSHIP....got a problem with that? Want to diagnose cars like the Pros? FOR SALE: OTC Perception 2 channel Labscope (badged as a Matco Reality) This is my personal labscope that I use to diagnose waveforms, like new, comes with leads and training video PM Me for details
|
|
#7
10-15-2003, 07:37 AM
|
||||
|
||||
|
Re: 2001 Service engine light
The P0440 code is for a "gross" leak in the Evap system...pretty much this is the "gas cap code"
but it is also caused by other failed componants that can cause a large leak. Ask them if they are using the J41413 Evap Presure/Purge diagnostic station (they will know it as the "smoke machine") This machine injects a chemical smoke into the gas tank and evap system and helps pinpoint leaks. With a P0440, it shouldn't be that hard to find a leak. Using the Smoke machine and running the "Service Bay Test" with the Tech 2, there is no reason why the problem isn't fixed by now.
__________________
Why do you never have enough time or money to do the job right the first time, but enough time and money to do it again? Got all the certifications 25 years ASE Certified Master Technician GM WCT Yea..I work at a DEALERSHIP....got a problem with that? Want to diagnose cars like the Pros? FOR SALE: OTC Perception 2 channel Labscope (badged as a Matco Reality) This is my personal labscope that I use to diagnose waveforms, like new, comes with leads and training video PM Me for details
|
|
#8
10-15-2003, 07:38 AM
|
||||
|
||||
|
Re: Re: 2001 Service engine light
Oh yea...some of the places I would look for a leak would be the tank seal, hoses to the vent and purge solenoids and make sure the FTP sensor is reading properly.
__________________
Why do you never have enough time or money to do the job right the first time, but enough time and money to do it again? Got all the certifications 25 years ASE Certified Master Technician GM WCT Yea..I work at a DEALERSHIP....got a problem with that? Want to diagnose cars like the Pros? FOR SALE: OTC Perception 2 channel Labscope (badged as a Matco Reality) This is my personal labscope that I use to diagnose waveforms, like new, comes with leads and training video PM Me for details
|
|
#9
10-23-2003, 09:11 PM
|
|||
|
|||
|
The service manager told me he did the smoke test twice and could not find a leak. This time they dropped the tank and tried the test. No leak at the tank but they found a small one on a cannister, between the vent solenoid and the tank, they are replacing that tomorrow.
He says a lot of the problem is the tolerance is so low that the computer kicks out the 440 code on even the slightest of leaks. Said he looks for GM to upgrade this and move the tolerance up.
|
|
#10
10-24-2003, 07:49 AM
|
||||
|
||||
|
Re: 2001 Service engine light
Have them install the latest and greatest calibrations into your PCM...the upgrade may already be there, sometimes they upgrade calibrations and don't sent out TSB's on them.
__________________
Why do you never have enough time or money to do the job right the first time, but enough time and money to do it again? Got all the certifications 25 years ASE Certified Master Technician GM WCT Yea..I work at a DEALERSHIP....got a problem with that? Want to diagnose cars like the Pros? FOR SALE: OTC Perception 2 channel Labscope (badged as a Matco Reality) This is my personal labscope that I use to diagnose waveforms, like new, comes with leads and training video PM Me for details
|
| ||||||||||||||||||||||||||||||||||||||
 |
POST REPLY TO THIS THREAD |
 |
|
|
