Powertrain, generic · Fuel and air metering

P01E5 Engine Coolant Temperature Sensor 3 Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

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. P01E5 means the signal voltage is too low, so the module would read an implausibly hot coolant – typically a signal wire shorted to ground, coolant or moisture in the connector, or an internally shorted sensor. 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

Signal wire of sensor 3 shorted to ground (chafing, water in connector)
Sensor shorted internally
Coolant in the connector, corrosion with leakage current
Control module input stage faulty

Symptoms

  • Check engine light on
  • Coolant temperature or cooling fan behaviour possibly affected
  • Often no change in driving

Repair estimate

DifficultyEasyDIY possible
Parts and labour€40–250
Time0.3–1.5 h

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

Parts involved

engine coolant temperature sensor 3sensor wiring

Related codes

P01E3P01E4P01E6P01E7P0117

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