Code Enable Criteria

• Engine running at least 140 seconds.
• Engine speed 1200-3410 RPM.
• ECT more than 149°F (65°C).
• TP angle 10-40 percent.
• No CKP, ECT, EVAP, fuel injector, knock, MAP, misfire, O2S1, PCM internal fault, TP or P0502 DTCs are set.

DTC sets when O2S1 voltage is not consistently fluctuating outside 300-600 millivolt for more than 5 seconds.