P1493

Tests 1 - 3:

Tests 4 - 6:

SYMPTOM
P1493-AMBIENT/BATTERY TEMPERATURE SENSOR VOLTS TOO LOW

WHEN MONITORED
With the ignition ON.

SET CONDITION
The PCM senses the voltage from the Ambient/Battery temperature sensor to be below 0.5 volt for 3 seconds.

POSSIBLE CAUSES
- Ambient/Batt temperature sensor signal circuit shorted to the sensor ground circuit
- Ambient/Batt temperature signal circuit shorted to ground
- Ambient/Batt temperature sensor
- PCM
- Wiring harness intermittent