P0070

Tests 1 - 4:

Tests 5 - 7:

Tests 8 - 9:

SYMPTOM
P0070-AMBIENT TEMP SENSOR STUCK

WHEN MONITORED
Engine Running.

SET CONDITION
After 4 warm-up cycles, the PCM did not see a 2 °C (35 °F) change in the Ambient Temperature Sensor voltage within 200 miles. Two Trip Fault.

POSSIBLE CAUSES
- Intermittent condition
- Ambient temperature sensor signal circuit shorted to battery voltage
- Ambient air temperature sensor voltage below 1.0 volt
- Ambient TEMP sensor signal circuit open
- Sensor ground circuit open
- Sensor signal circuit shorted to ground
- Ambient temperature sensor signal circuit shorted to sensor ground
- PCM low
- PCM high