P00E5
Intake Air Temperature/Fuel Temperature Correlation
Intake air and fuel temperature readings are inconsistent — at long soak both should match ambient. 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
- Fuel Temp Sensor
P00E5 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.