Powertrain, generic · Hybrid propulsion

P0A4E Generator Position Sensor Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0A4E is set when a generator resolver signal sits above its permitted range, which usually points to an open signal line pulled up by the input circuit or a short to a supply voltage. No manufacturer documents P0A4E publicly. Mitsubishi evaluates the same condition on the 2023 Outlander PHEV but reports it under its own codes: a sine or cosine voltage of 4.9 V or more for 0.21 s stores P0C67 or P0C6C. A Bosch patent explains how the averaged offset of the receiver coil lines reveals whether a line is shorted to supply rather than to ground. CARB requires out-of-range checks for hybrid input components. P0A4D is the low counterpart, P0A4B the general circuit code, P0A4C the plausibility check. The generator is usually shut off and the hybrid warning comes on.

Likely causes

Open resolver signal line or pushed-out terminal
Signal line shorted to a supply voltage
Faulty resolver input stage in the power drive unit

Symptoms

  • Hybrid system warning and MIL
  • Generator disabled, engine-only or no-start condition

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–3,500
Time1–8 h

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

Parts involved

generator position sensorwiring harnesshybrid control module

Related codes

P0A4DP0A4BP0A4CP0A4FP0C67P0C6C

References: mitsubishitechinfo.com, patents.google.com, law.cornell.edu.