Code Enable Criteria

• Engine running at least 30 seconds.
• ECT more than 167°F (75°C) for 20 seconds.
• TP angle 8-56 percent.
• Calculated airflow is more than 3 grams per second for at least 30 seconds.
• No CKP, ECT, EVAP, fuel injector, fuel tank pressure, fuel trim, IAT, idle speed, MAP, misfire, PCM internal fault or TP sensor DTCs are set.

DTC sets when O2S1 voltage is inactive (not reading outside 399-499 millivolt range) for 125 seconds.