Control Module Internal Temperature Sensor A Circuit High

Where it lives

For P0669, the sensor sits on the circuit this code reports. The description of P0669 reports a fault at the sensor.

Check these first

• A short to voltage on the internal temperature sensor circuit
• A failed internal temperature sensor
• Corrosion at the module connector
• A module running hot from a nearby heat source
• A failed control module

What to do next

1. Read the internal temperature on a scan tool when the module is cool
2. Inspect the module connector for a short to voltage
3. Look for a heat source near the module
4. Compare the reading to ambient temperature
5. Replace the control module if the reading stays high
6. Clear the code and retest

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