Powertrain, generic (extended)

P2D47 Hybrid/EV Battery Pack C Over Temperature

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

With P2D47 the battery controller reports that the third section of a divided traction battery, C, has exceeded its temperature limit. Because neighbouring sections share the same coolant or air supply, a fault confined to one letter usually points to a local cause: a blocked cooling channel, a cold plate that lost contact with its modules, or an air duct obstructed in that area. No manufacturer documents P2D47 publicly. For whole-pack overheating GM's 2011 Chevrolet Volt used P0A7E with a module limit of 73.5 °C, 50 failures in 60 samples, Type A, and skipped the test while a temperature sensor rationality fault was active. California's rule also expects the cooling performance of the battery to be verified. Expect reduced power until the section cools.

Likely causes

Blocked cooling channel or air duct serving section C
Poor thermal contact between section C modules and the cooling plate (missing or displaced thermal paste/pad)
Temperature sensor in section C reading high

Symptoms

  • Check engine or hybrid system warning light
  • Less electric power, especially after longer drives
  • Battery cooling fan or pump running at high speed

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 cbattery thermal managementbattery energy control module

Related codes

P2D46P2D48P0A7EP0EDEP0C32

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