P0114 — Intake Air Temperature Sensor 1 Circuit Intermittent
Low severityWhat it means
P0114 is stored when the engine control unit sees a fault involving the intake air temperature (IAT) sensor signal. The IAT sensor tells the control unit how warm the incoming air is, which fine-tunes fuelling and ignition timing, especially on cold starts. An “intermittent” fault appears and clears on its own, which almost always means a connection problem rather than a dead part.
Common symptoms
- A warning light that comes and goes
- Poor fuel economy
- Rough running on cold starts
- Minor hesitation in some cases
Likely causes
- Loose, backed-out or corroded connector pins
- Chafed wiring that shorts with movement or vibration
- Faulty IAT sensor (often built into the MAF)
- Corroded or damaged sensor connector
What to check first
- Wiggle-test the connector and harness while watching the live signal
- On a cold engine, IAT should match coolant and ambient temperature in live data
- Inspect the connector and pins
Can you keep driving?
Safe to drive; only fuel economy and cold running suffer until repaired, and it is usually a cheap fix.
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