P0071

Tests 1 - 3:

Tests 4 - 7:

SYMPTOM
P0071- AMBIENT TEMP SENSOR PERFORMANCE

WHEN MONITORED
With the ignition ON. Coolant Temperature greater than 71 °C (160 °F) No Inlet Air Temperature Sensor Faults present

SET CONDITION
After 5 warm cycles have occurred (coolant increases from great than 4.4 °C (40 °F) to a minimum of 71 °C (160 °F) and the odometer mileage has increased 196.6 miles and the Inlet Air Temperature has increased less than 3 °C (37.4 °F). Two trip fault.

POSSIBLE CAUSES
- Intermittent condition
- IAT sensor voltage below 1.0 volts
- Sensor ground circuit high resistance
- IAT sensor signal circuit high resistance
- PCM