Conditions For Running DTC
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- The ignition is ON.
- DTCs P1120, P1220, P1635, or P1639 are not set.
- The ignition voltage is greater than 5.23 volts.