P0073

Test 1 - 2:

Test 3 - 6:

SYMPTOM
P0073-AMBIENT TEMP SENSOR HIGH

WHEN MONITORED
The ignition key on.

SET CONDITION
The Ambient Temperature Sensor voltage is greater than 4.94 volts. One Trip Fault.

POSSIBLE CAUSES
- Ambient air temperature sensor voltage below 0.3 Volts
- Ambient air temperature sensor internal failure
- (K145) AAT signal circuit shorted to ground
- (K25) AAT signal circuit shorted to (K4) sensor ground circuit
- PCM