Powertrain, generic (extended)

P2D4A Hybrid/EV Battery Pack F Over Temperature

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2D4A covers section F, the sixth part of a battery whose controller watches temperature section by section. It pairs naturally with P0EE1, the deterioration code of the same section: aged cells with higher internal resistance turn more current into heat, and repeated overheating speeds up ageing, so both entries on one letter point at the modules themselves rather than at cooling. No manufacturer documents P2D4A publicly. How strictly a lamp follows varies even for the whole-pack code: GM's eAssist table 13OBDG05C sets P0A7E above 72.3 °C, taken from the maximum of the healthy sensors, as a Type B code with the MIL after two trips, while its plug-in tables rate it Type A. CARB requires cooling performance checks. Power is limited.

Likely causes

Aged modules in section F producing extra heat (often with P0EE1)
Insufficient cooling flow to section F
Sensor in section F reading too high

Symptoms

  • Warning light; timing depends on manufacturer (first or second trip)
  • Shorter electric range and weaker electric drive
  • Battery fan or coolant pump louder than usual

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 pack fbattery thermal managementbattery energy control module

Related codes

P2D49P2D4BP0EE1P0A7EP0BBD

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