P0071

Test 1 - 2:

Test 3 - 6:

SYMPTOM
P0071- AMBIENT TEMP SENSOR PERFORMANCE

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

SET CONDITION
After 5 warm cycles have occurred (coolant increases from greater 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 Ambient Air Temperature has increased less than 3° C (5.4° F). Two trip fault.

POSSIBLE CAUSES
- Good trip equal to zero
- Ambient air temp sensor voltage below 1.0 volt
- (K4) sensor ground high resistance
- (K25) ambient air temp sensor signal circuit has high resistance
- PCM