Powertrain, generic · Hybrid propulsion

P0A92 Hybrid Generator Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0A92 indicates that the generator of a hybrid system, the electric machine mainly used to convert engine power into electrical energy, does not reach the expected output, speed or torque. CARB requires manufacturers to describe how they monitor the generator so that faults preventing it from working are detected. FCA documents the code for the 2020 Jeep Compass and Renegade plug-in hybrids (bulletin 08-057-21): it appears together with drive motor phase current sensor codes, and the fix is a software update of the hybrid control processor and power inverter module. A turtle (limp home) lamp may accompany it. P0A90/P0A91 cover the drive motors; P0A3F and similar codes cover generator position sensing.

Likely causes

Hybrid controller or inverter software needing update (documented by FCA)
Inverter phase current sensing fault
Internal generator fault (winding, bearing, position sensor)

Symptoms

  • MIL and hybrid system warning
  • Limp home (turtle) lamp, reduced power
  • Reduced charging of the high-voltage battery

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–5,000
Time0.5–8 h

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

Parts involved

hybrid generator

Related codes

P0A90P0A91P0A3FP0A40P0BE6

References: static.nhtsa.gov, static.nhtsa.gov, law.cornell.edu.