01-13-2010, 05:40 PM
Join Date: Sep 2002
Location: Oakland, California
FWIW, Other GM vehicles have apparently had the same issue:
Some customers may comment on an intermittent MIL/SES light Illuminated with a message center or an indicator that displays Reduced Engine Power. DTC P2138 - Accelerator Pedal Position (APP) Sensor 1-2 Correlation may be set. The voltage difference between APP sensor 1 and APP sensor 2 exceeds a predetermined value for more than 2 seconds. Refer to DTC P2138 in SI for further diagnostics.
On some vehicles, the IP to body harness connector, which carries the APP signal to the ECM/PCM, is located in the left hand kick panel area and if the kick panel is not sealed properly, water enters and causes a short in the APP circuits setting a P2138 code.
Important: Do Not replace the accelerator pedal assembly.
Locate the IP to body harness connector, which may be located in and around the left hand kick panel area. Check to see if there is a water leak into the area and repair as necessary.
My Current Chevys:
1967 Camaro Coupe - 350HO/TKO-500 (Old Blue)
1967 Camaro RS - 327/PG (Goldie)
1995 Camaro Z28 - LT1/A4 (Norma Jean)
2002 Tahoe LS 2WD - LR4/A4 (The Big Red Truck)