P0110 Intake air temperature sensor 1 circuit (bank 1)
What P0110 means
The engine computer has a problem with the signal from the intake air temperature (IAT) sensor. On many cars this sensor is built into the mass air flow sensor. The computer uses a default temperature instead, so fuelling and ignition are slightly less precise.
P0110 is a generic SAE J2012 code: it means the same on every make. The exact cause still depends on the car, so read the freeze-frame data before replacing parts.
At a glance
- Severity
- Low
- Typical repair cost
- 30–150 €
- Workshop time
- 0.3–1 h
- Repair difficulty
- Easy
- DIY possible
- Yes
- Check engine light
- Yes
- Affects emissions test
- Yes
Parts and labour at an independent workshop in Europe. Main dealers charge more; the cause decides the bill, not the code.
Symptoms
- Check engine light on
- Usually little change in driving
- Possible slightly higher fuel consumption
- Possible harder starting in very cold or hot weather
Common causes
- Failed intake air temperature sensor
- Damaged wiring or a broken wire
- Loose or corroded connector
- Faulty MAF sensor where the IAT is integrated
Can I keep driving with P0110?
You can keep driving. Have it checked within one to two weeks; the engine runs on a default value and the effect is mostly small.
What to check first
- Find where the IAT sensor is fitted on your engine (separate in the intake, or part of the MAF) and check its connector.
- Read the live IAT value with a cold engine: it should be close to the outside temperature.
- Measure the sensor resistance and compare it with the specification for the current temperature.
- Repair wiring or replace the sensor (or the MAF assembly if the IAT is integrated).
Related codes
- P0111 Intake air temperature sensor 1 range/performance (bank 1)
- P0112 Intake air temperature sensor 1 circuit low (bank 1)
- P0113 Intake air temperature sensor 1 circuit high (bank 1)
- P0115 Engine coolant temperature sensor 1 circuit
- P0116 Engine coolant temperature sensor 1 range/performance
- P0117 Engine coolant temperature sensor 1 circuit low
- P0108 Manifold absolute pressure / barometric pressure sensor circuit high
- P0118 Engine coolant temperature sensor 1 circuit high
Data: TORKO fault-code catalogue, built on OBDex (CC0-1.0) and reviewed against workshop practice. Informational only — it does not replace a diagnosis by a mechanic.
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