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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 254 (Engine Controls Self-Diagnostics) >> Diagnostic Tests >> DTC P1415-P1416: Air System - Bank 1 & 2 >> Diagnostic Procedures

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. Start and idle the engine until Closed Loop is achieved. Turn OFF all the accessories. Monitor the HO2S bank 1 sensor 1 and bank 2 sensor 1 voltage parameters for the applicable bank with a scan tool. Command the AIR system ON with a scan tool. Observe and record the HO2S voltage as the AIR system is enabled. Does the HO2S voltage decrease to less than 222 mV? If yes, see DIAGNOSTIC AIDS . If no, go to next step.
  3. Perform a visual inspection of all pipes/hoses in the AIR system for the following conditions:
    • Loose or missing clamps on the AIR pipes/hoses.
    • No kinks, holes, or pinched hoses/pipes.
    • Components with evidence of heat damage.

    Did you find and correct a condition? If yes, go to step  7. If no, go to next step.

    4. CAUTION: While engine is operating, the exhaust system will become extremely hot. To prevent burns avoid contacting a hot exhaust system.
  4. Remove the crossover hose from the applicable check valve. Command the AIR pump relay ON with a scan tool. Is air flow present at the hose outlet? If yes, go to step  6. If no, go to next step.
  5. Repair the restriction or the leak for the applicable bank in the AIR crossover pipes/hoses between the exhaust check valve and the AIR shut-off valve. Did you complete the repair? If yes, go to step  7.
  6. Repair the restriction/leak or blockage for the applicable bank in one of the following components:
    • The exhaust check valve. See SECONDARY AIR INJECTION CHECK VALVE/PIPE under EMISSION SYSTEMS & SUB-SYSTEMS in REMOVAL & INSTALLATION - CORVETTE article.
    • The exhaust check valve outlet pipe.
    • The exhaust manifold.

    Did you find and correct a condition? If yes, go to step  7.

  7. 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 the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition cycle? If yes, go to step  2. If no, go to next step.
  8. Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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