What this code means

The PCM detected a malfunction in the ambient air temperature sensor circuit.

Symptoms

• Check Engine Light
• Incorrect climate control operation
• Incorrect outside temp display

Common causes

• Faulty ambient temp sensor
• Wiring damage
• Sensor location issue (heat soak)

Diagnostic steps

1. Test sensor resistance across temperature range
2. Inspect wiring
3. Check sensor mounting location

Repair notes

Replace ambient air temperature sensor.

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