P01E7 Engine Coolant Temperature Sensor 3 Circuit Intermittent/Erratic

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.

Likely causes

Symptoms

• Check engine light on
• Jumping coolant readings
• Usually no change in driving

Repair estimate

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

Related codes

References: law.cornell.edu, static.nhtsa.gov, hella.com.