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Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. 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. Is DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P1111, or P1112 set? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, go to next step.
    3. CAUTION: Turn OFF the ignition before inserting fingers into the throttle bore. Unexpected movement of the throttle blade could cause personal injury.
    NOTE: If any of the conditions listed below exist, replace the throttle body assembly. See THROTTLE BODY under AIR INDUCTION SYSTEMS in REMOVAL & INSTALLATION - CORVETTE article.
  3. Inspect the throttle body for the following:
    • TP sensor loose or damaged.
    • Loose or damaged throttle blade.
    • Cracked or bent throttle shaft.
    • Drive mechanism damage.

    Did you find and correct the condition? If yes, go to next step. If no, see DIAGNOSTIC AIDS .

  4. 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.
  5. 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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