Powertrain, generic · Hybrid propulsion

P0D85 Battery Charging Output Voltage Too High

Check engine lightOn
EmissionsNot relevant
Drive cycleRequired
Limp modeNo

P0D85 means the charger is putting more voltage onto the traction battery side than it should. In Ford's 2019 plug-in hybrid OBD summary the battery controller compares the charger's output voltage with its own request and flags a surplus of 20.82 V lasting 20 seconds. Mitsubishi's 2022 Outlander PHEV judges a change of output voltage of more than 450 V while the PHEV-ECU allows charging, stops the charge and points to the charger/DC-DC unit after checking the high-voltage fuse and the P/N lines; the 2023 list lights the hybrid warning and the MIL. Porsche reuses P0D8500 on 911 (992) petrol models for a battery voltage judged too high at cold start, fixed by DME software (TI 203/23). Related: P0D20, P0D21 and the sensor code P0D4F.

Likely causes

Voltage control fault inside the on-board charger/DC-DC unit
Open high-voltage fuse or P/N line between charger and battery (output unloaded)
Control unit software error (e.g. Porsche DME, reprogramming)

Symptoms

  • Charging stops
  • Hybrid system warning and check engine light

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–2,500
Time0.5–4 h

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

Parts involved

on board chargerhv battery

Related codes

P0D20P0D21P0D4FP0D22P0D5C

References: fordservicecontent.com, mitsubishitechinfo.com, mitsubishitechinfo.com, static.nhtsa.gov.