Question about 1999 Chevrolet Camaro

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01 camaro drive by wire reduced engine speed

My son bought his first car off ebay, 01 V6 5 speed Camaro we keep getting reduced engine speed code. Gm dealer installed a new TAC gas pedal assy, this did not cure it so they took it off next was a new ECM and reprogram car is still broke. Another local shop has it now and they have not found anything defining, except while on the scanner you can clear the code and the car runs fine. We installed a used 50.00 throttle body no good. We are now trying to go through the flow charts on alldata----have any other ideas?? This is a drive by wire car, best we can tell 01 & 02 V6 had this only?? Zs do not hav this correct??

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Hi novaman i was wondering if you maybe fixed your problem because i am having the same problem on my 99 camaro and canmt figure it any suggestions?

Posted on Aug 29, 2010


This is what I find from other webpost..

Some customers may comment on an MIL/SES light Illuminated with the" Reduced Engine Power" message or indicator displayed. A technician may find two or more of the following DTCs stored in the ECM:

P060E : Control Module Throttle Position (TP) System Performance

P1516 : Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

P2135 : Throttle Position (TP) Sensor 1-2 Correlation

P2138 : Accelerator Pedal Position (APP) Sensor 1-2 Correlation

A battery voltage drop during the cranking cycle may cause the codes to set and place the vehicle into the reduce engine power mode.

Test and charge the battery using the steps below.

Important: A low voltage condition may cause at least two of the following DTCs to set.

P060E : Control Module Throttle Position (TP) System Performance

P1516 : Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

P2135 : Throttle Position (TP) Sensor 1-2 Correlation

P2138 : Accelerator Pedal Position (APP) Sensor 1-2 Correlation

Perform a Diagnostic System Check. Refer to Diagnostic System Check - Vehicle in SI.
Check for DTCs and review the Freeze Frame/Failure Records to determine if sufficient ignition voltage was present when the DTC set.
- If the ignition voltage was low, then check for a possible battery drain. Refer to Battery Electrical Drain/Parasitic Load Test.

- If the ignition voltage was sufficient when the code set, proceed with normal SI diagnosis for the code(s) set.

Test and recharge the battery using Bulletin 02-06-03-009 or latest version on "Battery Charging Tips'.
Clear all DTCs.

Posted on Nov 07, 2008


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