OBD-II code · Powertrain (generic)
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).
Is it safe to drive with P00E9?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor reading drifted
- Less likelySensor element aged beyond calibration window
- Less likelySensor mounting loose - signal damping
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Iat Sensor 3
Related codes
- P0096Intake Air Temperature Sensor 2 Circuit Range/Performance Bank 1
- P00A6Intake Air Temperature Sensor 2 Circuit Range/Performance Bank 2
- P00ABIntake Air Temperature Sensor 1 Circuit Range/Performance Bank 2
- P00EEIntake Air Temperature Sensor 3 Circuit Range/Performance Bank 2
- P00E6Intake Air Pressure Measurement System - Multiple Sensor Correlation Bank 2
- P00E7Intake Air Temperature Measurement System - Multiple Sensor Correlation Bank 2
- P00E8Intake Air Temperature Sensor 3 Circuit Bank 1
- P00EAIntake Air Temperature Sensor 3 Circuit Low Bank 1
- P00EBIntake Air Temperature Sensor 3 Circuit High Bank 1
- P00ECIntake Air Temperature Sensor 3 Circuit Intermittent/Erratic Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.