What this code means

The PCM has detected an intermittent low-voltage condition on the Intake Air Temperature sensor circuit. The signal drops below the expected minimum voltage sporadically, affecting air density calculations.

Symptoms

• Check Engine Light
• Minor driveability issues during signal dropout
• Slightly rough cold starts

Common causes

• Loose IAT sensor connector
• Corroded IAT sensor wiring
• Intermittent open in IAT sensor circuit
• Faulty IAT sensor with internal intermittent fault

Diagnostic steps

1. Wiggle test IAT sensor connector while monitoring voltage on scan tool
2. Inspect IAT sensor connector pins for corrosion
3. Test IAT sensor resistance at various temperatures
4. Check wiring continuity in IAT circuit

Repair notes

Repair or replace the IAT sensor connector; replace the IAT sensor if it has an internal intermittent fault.

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