Hey Recently My Truck Had A Check Engine Light On It Came On On Saturday Afternoon With The Power Reduce Light Also I Hit The Gas And It Did Not Move Turn The Car Off And Back On And I Was Able To Get Going Light Remain On That Day And Sunday Then Sunday Night Light Turn Off I Check The Code On Monday With A Match Scanner And Pulled P1680 The Light Is Not On But I Was Checking And Found Some Website That States There Is A Tsb Available For This Code And That There Might B A Warranty Up 80k Miles.have U Guys Heard About This And Do U Guys Know About This Code.
camilosi
I found this on an other site:
you have to reprogramm the ecm.here is a bulletin for this problem.Subject: Service Engine Soon Light On, P1680 (Reprogram or Replace PCM)
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Models: 2004 Buick Rainier
2004 Chevrolet Trailblazer
2004 GMC Envoy
2004 Oldsmobile Bravada
with 4.2L Engine (VIN S - RPO LL8)
Some customers may comment on the Service Engine Soon Light coming on. Upon investigation, the technician may find a P1680 diagnostic trouble codeCheck the resistance of the accelerator pedal position sensors using the procedure in the appropriate Service Information for DTC P1680.
If the resistance of the accelerator pedal position sensor is within the specifications shown in the Service Information and the vehicle was built prior to the following VIN breakpoints, then reprogram the PCM with the latest calibration.
If the resistance of the accelerator pedal position sensor is within the specifications shown in the Service Information and the vehicle was built after the following VIN breakpoints, then replace the PCM. If the resistance of the accelerator pedal position sensor is outside the specifications shown in the Service Information, then continue with the diagnostics for DTC P1680.
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Here is the site: http://www.2carpros.com/forum/2004-gmc-envoy-trouble-code-vt118343.html
You might fix it with a need PCM flash (a new flash will provide needed updates anyway), but if PCM needs to be replaced, it should be free under the emissions warranty
you have to reprogramm the ecm.here is a bulletin for this problem.Subject: Service Engine Soon Light On, P1680 (Reprogram or Replace PCM)
________________________________________
Models: 2004 Buick Rainier
2004 Chevrolet Trailblazer
2004 GMC Envoy
2004 Oldsmobile Bravada
with 4.2L Engine (VIN S - RPO LL8)
Some customers may comment on the Service Engine Soon Light coming on. Upon investigation, the technician may find a P1680 diagnostic trouble codeCheck the resistance of the accelerator pedal position sensors using the procedure in the appropriate Service Information for DTC P1680.
If the resistance of the accelerator pedal position sensor is within the specifications shown in the Service Information and the vehicle was built prior to the following VIN breakpoints, then reprogram the PCM with the latest calibration.
If the resistance of the accelerator pedal position sensor is within the specifications shown in the Service Information and the vehicle was built after the following VIN breakpoints, then replace the PCM. If the resistance of the accelerator pedal position sensor is outside the specifications shown in the Service Information, then continue with the diagnostics for DTC P1680.
__________________________________________
Here is the site: http://www.2carpros.com/forum/2004-gmc-envoy-trouble-code-vt118343.html
You might fix it with a need PCM flash (a new flash will provide needed updates anyway), but if PCM needs to be replaced, it should be free under the emissions warranty
hm, maybe that's why my check engine light keeps coming on. It'll stay on for a bit, then when I'm about to go check it, it goes off for like a week or two, then comes back on for like a couple days. Haven't noticed any problems though.
Check Engine and Reduce Engine Light came on
Hello everybody,
I really need somebody's help. Ive owned a trailblazer 04 for the past 7 months. Sometimes when waiting on a light and when trying to accelerate it will seem like it wants to turn off. When I stop again the service engine soon comes on and the reduce engine comes on. At the moment I can be pressing the pedal and it doesnt move. It moves but slowly. I turned my car off and then turned it bavk on and then it starts running okay. But with the engine light on.
I went to autozone to get it checked and the gave me the P1680 code and the guy tells me I have to buy a new computer for the vehicle. Can somebody tell me what to do? This is the only car I depend on.
Hello everybody,
I really need somebody's help. Ive owned a trailblazer 04 for the past 7 months. Sometimes when waiting on a light and when trying to accelerate it will seem like it wants to turn off. When I stop again the service engine soon comes on and the reduce engine comes on. At the moment I can be pressing the pedal and it doesnt move. It moves but slowly. I turned my car off and then turned it bavk on and then it starts running okay. But with the engine light on.
I went to autozone to get it checked and the gave me the P1680 code and the guy tells me I have to buy a new computer for the vehicle. Can somebody tell me what to do? This is the only car I depend on.
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