Powertrain, generic (extended)

P2CD3 Hybrid/EV Battery Pack N Deterioration

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2CD3 closes the lettered deterioration series: N is the fourteenth section of a drive battery whose management assesses each section's condition separately. When it sets, section N can no longer hold or release the energy expected of it, even though wiring and sensors may be intact. No manufacturer documents P2CD3 publicly, and no published battery reaches fourteen individually rated groups; Audi's Q5 PHEV stops at group 8 (P2CCD). CARB obliges diagnostics of storage parts such as cells to name the smallest unit that can be swapped; a pack split this finely would reach codes up to here. Distinguish it from P0BBD, which reports a voltage spread between cells, and from the whole-pack code P0A7F. Typical effects are the MIL, reduced electric range and at times limited power.

Likely causes

Cells in section N aged beyond the acceptance limit
Earlier replaced neighbour modules leave section N as the weak link
Battery controller misjudges section N after a reset or update

Symptoms

  • MIL or hybrid warning
  • Electric range clearly reduced
  • Drive power limited at times

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 nbattery energy control module

Related codes

P2CD2P2CCFP0A7FP0BBD

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