What this code means

The Intake Air Temperature sensor signal is intermittent. The PCM detects erratic fluctuations in the IAT signal, which affects the air/fuel mixture calculations.

Symptoms

• Check Engine Light
• Rough idle when cold
• Poor cold-start performance
• Fluctuating idle

Common causes

• Loose IAT sensor connector
• Corroded IAT sensor wiring
• Faulty IAT sensor
• Damaged connector pins

Diagnostic steps

1. Inspect IAT sensor connector for corrosion or looseness
2. Wiggle test wiring while monitoring IAT reading
3. Test IAT sensor resistance (should change smoothly with temperature)
4. Check wiring continuity

Repair notes

Repair connector or wiring. Replace IAT sensor if faulty.

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