Powertrain, generic (extended)

P2CD0 Hybrid/EV Battery Pack K Deterioration

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

With P2CD0 the battery controller reports that section K, the eleventh separately judged part of the high-voltage battery, has exceeded its ageing limit. Such a verdict normally rests on comparing what this section stores and delivers with its neighbours over many charge cycles, so it rarely appears suddenly after one event. No manufacturer publishes P2CD0; published section-level codes stop at eight groups (Audi Q5 PHEV, P2CCD). Only a battery split into eleven or more monitored units would ever reach it. California's OBD rule requires such codes to narrow faults down to the smallest unit that can be replaced. Before a module is renewed, a thermal cause should be ruled out, since overheating of section K is reported separately as P2D4F. Range and available power drop, and the MIL usually lights.

Likely causes

Cells of section K lost capacity faster than the other sections
Internal resistance of section K increased, limiting power
Uneven coolant flow leaving section K warmer over years

Symptoms

  • Warning lamp for engine or hybrid system
  • Shorter range on a full charge
  • Weaker acceleration on battery power

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€400–6,000
Time2–10 h

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

Parts involved

hv battery pack kbattery energy control module

Related codes

P2CCFP2CD1P2D4FP0A7F

References: law.cornell.edu, static.nhtsa.gov, static.nhtsa.gov.