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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Engine Controls - Self-Diagnostics - 4.0L) >> Diagnostic Tests >> DTC P1415 & P1416: Air System - Bank 1 & 2 >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. 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, go to DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM.
  2. Install a scan tool. Idle the engine in Closed Loop. Turn OFF all the accessories. Observe the HO2S voltage for the affected bank with a scan tool. Command the AIR system ON with a scan tool. Observe and record the HO2S voltage while the AIR system is commanded ON. Does the HO2S voltage drop below 350 mV? If yes, see DIAGNOSTIC AIDS . If no, go to next step.
  3. Turn OFF the ignition. Disconnect the vacuum line from the shut-off valve for the affected bank. Connect a vacuum gauge to the vacuum line. Start and idle the engine. Command the AIR system ON with a scan tool. Does the vacuum gauge indicate more than 12 in. Hg? If yes, go to next step. If no, go to step  5.
  4. Inspect all pipes and hoses for the following conditions:
    • Proper connections.
    • Secure clamps on the pipes and on the hoses.
    • Block, holes, or pinches.
    • Components with evidence of heat damage.

    Did you locate the condition? If yes, go to step  6. If no, go to step  7.

  5. Replace the vacuum line between the AIR solenoid valve and the affected bank AIR shut-off valve. After repairs, go to step  8.
  6. Repair the condition. After repairs, go to step  8.
  7. Replace the AIR shut-off valve for the affected bank. After repairs, go to next step.
  8. Use the scan tool in order to clear the DTCs. 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.
  9. With a scan tool, observe the stored information, Capture Info. 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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