Code Enable Criteria

• PCM is using non purge fuel trim cells.
• Engine speed is 500-4000 RPM.
• Loop status is closed.
• ECT is 140-259°F (60-115°C).
• IAT is 10-176°F (-20-80°C).
• MAP is 30-90 kPa.
• TP angle is less than 75 percent.
• Barometric pressure is greater than 70 kPa.
• Calculated airflow is 2-80 grams per second.
• No CMP, CKP, ECT, EGR flow, EVAP purge solenoid, IAC valve, IAT, MAP, misfire, O2S1, PCM internal fault or TP sensor DTCs are set.

DTC sets when combined average of idle and cruise long term fuel trim cells is less than -21.1 percent correction, current short term fuel trim cell is less than zero percent and condition exists for greater than 3 seconds.