Powertrain, generic · Hybrid propulsion

P0A72 Generator Phase V Current

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0A72 reports a fault in the phase V current of the hybrid generator. Toyota uses it: a field report filed with NHTSA covers a 2006 Highlander Hybrid with the MIL on and P0A72 stored together with P0A75 for generator phase W, P0A60 and P0A63 for drive motor A, and inverter performance codes including P0A78; after checking connector fit and the resistance of the three-phase cables, the inverter/converter assembly was replaced. The pairing of V and W codes fits inverters that measure two phases and calculate the third, as a Hyundai patent describes for its starter-generator. P0A73 and P0A74 are the low and high cases, P0A6F and P0A75 phases U and W. Expect a hybrid warning and possibly no drive.

Likely causes

Internal fault in the inverter/converter assembly (Toyota Highlander Hybrid)
Generator phase V current sensor failed
Poor pin fit or damaged three-phase cable to the generator

Symptoms

  • MIL and master warning, several hybrid codes at once
  • Vehicle may not move or enter ready mode

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€500–6,000
Time1.5–8 h

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

Parts involved

generator phase vinverter

Related codes

P0A73P0A74P0A6FP0A75P0A60P0A78

References: static.nhtsa.gov, patents.google.com, patents.google.com.