Code Enable Criteria
WARNING: This page is about a different car, the 2001 GMC Savana, 2001 Chevrolet RV Cutaway, 2001 Chevrolet Cutaway, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
- Engine airflow is less than 22 grams/second.
- Engine load is less than 33.25 percent.
- Fuel system is not operating in power enrichment or deceleration fuel cut-off.
- Converter over temperature is not active.
- Engine run time is more than 20 seconds after closed loop operation.
- Air/fuel ratio is 13.125:1.
- Short term fuel trim is -3-3 percent.
- Engine speed is more than 900 RPM.
- Engine Coolant Temperature (ECT) is 158-230°F (70-110°C).
- Ignition voltage is more than 11.7 volts.
- Start-up ECT is less than 176°F (80°C).
- Intake Air Temperature (IAT) is 36-212°F (2-100°C).
- Vehicle speed is more than 25 MPH.
- DTCs P0137, P0138, P0140, P0141, P0143, P0144, P0146, P0147, P0151-P0155, P0157, P0158, P0160, P0161, P0171, P0172, P0174, P0175, P0300, P0500, P1106, P1107, P1111, P1112, P1114, P1115, P1121, P1122, P1133, P1134, P1153, P1154, P1351, or P1361 are not set.
DTC sets when HO2S voltage does not go less than 222 millivolts within one second when AIR pump turns on during closed loop operation.