Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- An intermittent may be caused by any of the following conditions:
- Low system airflow
- Excessive exhaust system back-pressure
- Pinched, restricted, split, or damaged pipes/hoses
- Restrictions in the AIR pump inlet hose
- Pitted contacts in the AIR pump relay, AIR solenoid relay-Tap on the AIR pump relay or AIR solenoid relay to attempt to duplicate an intermittent condition.
- Heat damage to the AIR outlet hose may indicate an shut-off valve failure
- Yellow tinted water in the AIR pump may indicate an shut-off valve failure
- Water or debris ingested into the AIR pump
- Observe the Freeze Frame/Failure Records to aid in conditions of setting DTC P0410.
- Thoroughly inspect any circuits that are suspected of causing the intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
- If a repair is necessary, refer to Wiring Repairs or Connector Repairs in Wiring Systems.