Powertrain, generic · Hybrid propulsion

P0C66 Generator Position Sensor Circuit A Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0C66 means the signal of circuit A of the generator resolver has dropped below its lower limit. Mitsubishi uses it on the 2023 Outlander PHEV for the sine winding: the generator control unit, supplied with at least 8 V, watches the line continuously and sets the code when the sine voltage stays at or below 2.000 V for 0.21 s. A short to ground on a sine lead or a damaged winding are the classic causes; a Bosch patent shows that the averaged potential of the coil lines reveals whether a lead touches ground or supply. Mitsubishi first checks for radiator fan codes and tests the resolver circuit, and replaces the power drive unit, or later the generator, only if the code comes back. P0C67 is the high counterpart, P0C6B the same test on the cosine side.

Likely causes

Sine lead of the resolver shorted to ground or to the housing
Shorted or damaged sine winding in the generator resolver
Faulty input stage in the power drive unit (generator control unit)
Damaged or contaminated resolver connector pins

Symptoms

  • Malfunction indicator lamp and hybrid warning shortly after switching on
  • Generator out of service, no charging by the engine
  • Reduced driving power

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–6,000
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

P0C64P0C67P0C6BP0A4DP0A4B

References: mitsubishitechinfo.com, mitsubishitechinfo.com, patents.google.com.