Powertrain, generic · Hybrid propulsion

P0C64 Generator Position Sensor Circuit A

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0C64 is the catch-all entry for the first pickup circuit of the generator resolver, the sensor that reports rotor angle so the inverter can energise the generator phases at the right moment. It is used when the controller judges that circuit faulty without sorting the fault into low, high, implausible or sporadic. No manufacturer documents P0C64 publicly. Mitsubishi shows how such faults get split on the 2023 Outlander PHEV: the sine winding, which it treats as circuit A, has its own low and high codes (P0C66, P0C67), and a failed internal status goes to P0A4B. CARB asks for an approved generator monitoring plan and for circuit and range checks on hybrid inputs. Expect a hybrid system warning and, depending on the design, reduced power or no charging by the engine.

Likely causes

Open, chafed or shorted lead in the first resolver pickup winding circuit
Corroded or loose resolver connector between generator and inverter
Damaged pickup winding inside the generator resolver stator
Fault in the generator control electronics of the inverter or power drive unit

Symptoms

  • Hybrid system or malfunction indicator lamp on
  • Engine runs but the high-voltage battery is no longer charged by the generator
  • Reduced power or hybrid functions disabled

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–5,000
Time1–10 h

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

Parts involved

generator position sensor awiring harnesshybrid control module

Related codes

P0C65P0C66P0C67P0C68P0C69P0A4B

References: mitsubishitechinfo.com, law.cornell.edu, en.wikipedia.org.