Common Symptoms
- Check Engine Light illuminated
- Hard starting when engine is cold
- Rough idle or stalling
- Poor fuel economy
- Black smoke from exhaust
- Engine runs rich or flooding
Most Likely Root Causes
- Faulty intake air temperature sensor
- Damaged or shorted wiring harness to IAT sensor
- Corroded or damaged sensor connector
- Short to ground in IAT sensor circuit
- Failed engine control module
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Component Location
The IAT sensor is typically integrated into the MAF sensor housing or located in the intake air duct between the air filter and throttle body.
Manufacturer Notes
Some manufacturers integrate the IAT sensor into the MAF sensor assembly requiring replacement of the entire unit if the IAT portion fails.
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