P0110
Intake Air Temperature Sensor Circuit Malfunction
The ECU detects a general electrical fault in the intake air temperature (IAT) sensor circuit. Signal absent, shorted or out of plausible range. Generic catch-all when no more specific IAT code (low/high/range) is set.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- IAT sensor failed (open or shorted)Common
- IAT wiring or connector faultPossible
- Combined MAF/IAT module faultyLess likely
Parts involved
- IAT Sensor
- IAT Wiring
- IAT Connector
P0110 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.