P01E7Engine Coolant Temperature Sensor 3 Circuit Intermittent/Erratic
- 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. P01E7 covers jumps or brief dropouts in the signal – coolant temperature cannot change that fast, so loose contacts, wires broken by vibration or a sensor that opens internally when the temperature changes are the usual causes. 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
- Jumping coolant readings
- Usually no change in driving
- Likely causes
- LikelyLoose contact at connector or pins
- LikelyWire break in the harness (movement, vibration)
- PossibleSensor opening internally with temperature changes
- PossibleCorrosion or moisture in the connector
- 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.