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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 43 (Engine Control System Self-Diagnostics - 3.8L) >> Diagnostic Tests >> DTC P1281: Accelerator Pedal Position Sensor 2 Disagrees With Sensors 1 & 3 >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2002 Pontiac Firebird and 2002 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you perform the Diagnostic System Check-Engine Controls? If yes, go to next step. If no, see DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM.
    2. NOTE: If any other DTCs are also set, diagnose these DTCs first. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
  2. Turn ON the ignition, with the engine OFF. With a scan tool, observe the APP sensor voltage parameter for this APP. Does the scan tool indicate the voltage is 0.5-1.3 V? If yes, go to next step. If no, go to step  4.
  3. With a scan tool, observe the APP sensor Agree/Disagree parameters. Slowly depress the accelerator pedal to Wide Open Throttle (WOT) stopping briefly at approximately 25 percent, 50 percent and 75 percent. Then slowly return to a closed throttle position stopping briefly at approximately 75 percent, 50 percent and 25 percent. Does the scan tool indicate Agree for all APP sensor Agree/Disagree parameters? If yes, see DIAGNOSTIC AIDS . If no, go to next step.
  4. Replace the TAC module. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. After repairs, go to next step.
  5. Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running DTC. Does the DTC run and pass? If yes, go to next step. If no, go to step  2.
  6. Observe the stored information, Capture Info with a scan tool. Does the scan tool display any DTCs that you have not diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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