Code Enable Criteria

For DTC to run, the following conditions must be met:

• DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0131, P0135, P0137, P0138, P0140, P0141, P0151-P0155, P0171-P0175, P0200, P0300, P0335, P0336, P0351-P0358, P0443, P0500, P0502, P0503, P1133, P1134, P1153, P1154, and P1258 are not set.
• Engine operates for more than 30 seconds.
• Engine run time is more than 15 seconds after closed loop operation.
• Engine speed is more than 850 RPM.
• Vehicle speed is 25 MPH.
• Maximum airflow is 22 grams/second.
• ECT is 14-255°F (-10 to 110°C).
• IAT is 14-212°F (-10 to 100°C).
• Ignition voltage is more than 11.7 volts.
• Engine load is less than 40 percent.
• Engine is not operating in power enrichment mode or in deceleration fuel cut-off mode.
• Short-term integrators are monitored while in fuel trim cells 1, 2, and 5.

DTC will set when AIR pump turns on during closed loop operation and HO2S voltage does not go less than 222 mV for one second. DTC will also set when AIR pump turns ON during closed loop operation and short term fuel trim does not change a pre-determined value.