Powertrain, generic · Hybrid propulsion

P0A50 Generator Position Sensor Circuit Overspeed

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0A50 says the generator speed derived from its resolver has exceeded the permitted maximum. Mitsubishi documents it for the 2023 Outlander PHEV: with at least 8.0 V at the generator control unit and the position sensor itself judged healthy, a speed of 15,500 rpm or more lasting 0.5 s stores P0A50, and the repair path ends with replacing the generator. Because a resolver fault would already be caught by P0A4B to P0A4F, an overspeed entry usually reflects a real mechanical overspeed, for example from a transaxle or clutch problem, or an internal generator fault. The drive motor counterparts are P0A44 and P0A4A. CARB requires hybrid components to be monitored. Expect a hybrid warning and the generator being shut off to protect it.

Likely causes

Internal generator fault (Mitsubishi repair path ends with generator replacement)
Mechanical fault in the transaxle or clutch letting the generator overrun
Incorrect speed calculation in the power drive unit

Symptoms

  • Hybrid system warning and MIL
  • Generator shut off, reduced power or engine-only drive

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€300–5,000
Time1–10 h

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

Parts involved

generator position sensorwiring harnesshybrid control module

Related codes

P0A4BP0A4CP0A44P0A4AP0A92

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