P0070 - AMBIENT AIR TEMPERATURE SENSOR STUCK

For a complete wiring diagram Refer to Section 8W

Theory of Operation

The Ambient Air Temperature Sensor is a two wire sensor that is hard wired to the TIPM. The TIPM supplies a 5 volt sensor signal and sensor ground to the sensor. The sensor internal resistance changes in response to changes in ambient temperature. The TIPM provides the ECM with ambient temperature over the CAN Bus network.

When Monitored:
With the ignition on.
Set Condition:
The Ambient Air Temperature Sensor signal over CAN Bus from the TIPM is implausible.

Possible Causes

INTERMITTENT DTC

TOTALLY INTEGRATED POWER MODULE

AMBIENT TEMPERATURE SENSOR

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test

1. DTC IS ACTIVE

NOTE: The Ambient Air Temperature Sensor is hardwired to the TIPM.

Ignition on, engine not running.
With the scan tool, Clear DTCs in the Engine Control Module (ECM).
Monitor the scan tool for at least two minutes.
Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time.
With the scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

Refer to the Service Information to diagnose problem with Ambient Air Temperature Sensor or associated wiring and connectors.

Test Complete.