P00CE
Intake Air Temperature Measurement System - Multiple Sensor Correlation Bank 1
Multiple intake air temperature sensors on bank 1 disagree beyond plausible limits. The intake air temperature sensor feeds the ECM's density calculation — a drifted reading miscalculates fuel mass and pushes mixture lean (cold reading) or rich (hot reading).
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- One sensor driftedCommon
Parts involved
- IAT Sensor 1
- IAT Sensor 2
P00CE 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.