Powertrain, generic

P0ED3 Hybrid/EV Battery F Voltage High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0ED3 is logged once battery F of the hybrid/EV system climbs above its permitted maximum voltage. It is the high member of the F series, next to P0ED2 (low) and P0ED1 (unstable). No manufacturer documents P0ED3 publicly. GM's hybrid tables show how strictly overvoltage is treated at pack level: above 479 V the P0ABD monitor fails within one trip. Ford sets P0AFB when its pack stays above 362.2 V on plug-in or 327.8 V on full hybrids for 10 seconds. Within a single unit an excess voltage usually means its cells were charged further than the rest, for instance because the balancing circuit of that unit quit, or that its measuring channel reads high. Charging and regeneration stay restricted until the cause is found; a warning appears and plug-in charging may be refused.

Likely causes

Balancing circuit of unit F failed, cells overcharged
Measuring channel of unit F reading too high
Charger or regeneration control overshooting

Symptoms

  • Charging refused or regenerative braking weak
  • MIL and battery warning

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–4,000
Time1–10 h

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

Parts involved

hv battery fbms

Related codes

P0ED0P0ED1P0ED2P0ECFP0ABDP0AFB

References: gsi.ext.gm.com, fordservicecontent.com, law.cornell.edu.