P01E3Engine Coolant Temperature Sensor 3 Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Coolant temperature sensor 3 is a third NTC coolant sensor on engines with thermal management or split cooling circuits; its position is defined by the manufacturer – on Jaguar Land Rover's 2018–2019 Ingenium petrol engines it sits in the engine block water jacket, on Audi's 3.0 TFSI V6 it is part of the thermal management. As with every NTC sensor, a low signal voltage means hot and a high one cold. CARB requires such additional sensors to be monitored from model year 2019 onwards. P01E3 is the general circuit fault of this sensor without telling low from high. No manufacturer document using exactly this code was found; it is described by analogy with its documented sibling codes and the NTC principle.
- What you may notice
- Check engine light on
- Coolant temperature or cooling fan behaviour possibly affected
- Often no change in driving
- Likely causes
- LikelyOpen circuit or loose contact at connector or wiring of sensor 3
- LikelySensor open or shorted
- PossibleShort to ground or voltage in the harness
- RareControl module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.