P0070

Test 1 - 4:

Test 5 - 7:

Test 8:

SYMPTOM
P0070-AMBIENT TEMP SENSOR STUCK

WHEN MONITORED
Engine Running.

SET CONDITION
After 4 warm-up cycles, the PCM did not see a -15 °C (4 °F) change in the Ambient Temperature Sensor voltage within 200 miles . Two Trip Fault.

POSSIBLE CAUSES
- Good trip equal to zero
- (K145) AAT signal circuit shorted to battery voltage
- Ambient AIR temperature sensor voltage below 0.1 volt
- (K145) AAT signal circuit open
- (K4) Sensor ground circuit open
- (K145) AAT signal circuit shorted to ground
- (K145) AAT signal circuit shorted to (K4) sensor ground
- PCM Low
- PCM High