October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

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.