Intake Air Temperature (IAT) Sensor Circuit Intermittent
What does P0114 mean?
The P0114 code means the vehicle's onboard diagnostic system has detected: Intake Air Temperature (IAT) Sensor Circuit Intermittent. This is a low severity code.
Common Symptoms
- Check Engine Light on, may be intermittent
- Slight fluctuations in idle speed
- Minor fuel economy changes
- Engine may run slightly rich or lean intermittently
- No major drivability issues in most cases
Probable Causes (Ranked by Likelihood)
- Loose or corroded IAT sensor connector Very High
- Damaged wiring with intermittent connection High
- Failing IAT sensor with erratic output Moderate
- Water or debris contamination at the sensor connector Moderate
- Poor ground connection for the sensor Low
Step-by-Step Diagnostic Procedure
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Inspect the IAT sensor connector for loose pins, corrosion, or damage. Wiggle the connector while monitoring IAT temperature on a scan tool.
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Check IAT sensor reading with a cold engine. It should match ambient temperature (within 10 degrees F). Erratic jumps indicate an intermittent fault.
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Measure IAT sensor resistance. At 68 degrees F it should be approximately 2,000-3,000 ohms. At 212 degrees F it should be approximately 200-300 ohms.
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Inspect the wiring for chafing or damage, especially where it routes near the intake manifold or engine accessories.
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Clean the connector with electrical contact cleaner and apply dielectric grease to prevent future corrosion.
Frequently Asked Questions
Can I drive with code P0114?
Yes, you can drive normally. The IAT sensor provides supplemental air temperature data. The PCM can compensate using other sensors, so drivability will be largely unaffected.
Where is the IAT sensor located?
The IAT sensor is usually located in the air intake duct between the air filter box and the throttle body. On some vehicles, it is built into the MAF sensor as a combined unit.
What makes this code intermittent vs. a fixed fault?
An intermittent code means the signal drops out or spikes randomly rather than being consistently wrong. This is almost always a connector or wiring issue rather than a complete sensor failure.