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DTC codes / P0Exx · Hybrid propulsion / P0E7F

P0E7FAuxiliary Cooling Coolant Temperature Sensor A Circuit Intermittent/Erratic

P0E7F indicates that the powertrain control module (PCM) has detected an intermittent or erratic signal from the auxiliary cooling coolant temperature sensor on circuit A. The PCM monitors this sensor to manage cooling fan operation and auxiliary coolant pump activity, and it sets the code when the signal voltage jumps unpredictably or drops out momentarily rather than failing completely.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaHybrid propulsion

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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