Powertrain
generic / SAE
P00E9
Intake Air Temperature Sensor 3 Circuit Range/Performance Bank 1
IAT sensor 3 reading on bank 1 implausible. 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).
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / E9
Possible causes
- Sensor reading drifted high
- Sensor element aged beyond calibration window low
- Sensor mounting loose - signal damping low
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 40–250 €
- Estimated time: 0.3–1.5 h
- Component: iat sensor 3
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012