What does code P2C87 mean?

Q: What does code P2C87 mean?

Hybrid/EV Battery Voltage External Isolation Warning. P2C87 indicates that the hybrid or electric vehicle battery management system has detected a loss of external isolation, meaning the high-voltage battery is no longer properly electrically isolated from the vehicle chassis. The computer monitors isolation resistance between the high-voltage system and ground, and it sets this warning when that resistance drops below a safe threshold, creating a potential shock hazard.

DTC codes / P2Cxx · Hybrid propulsion / P2C87

P2C87Hybrid/EV Battery Voltage External Isolation Warning

P2C87 indicates that the hybrid or electric vehicle battery management system has detected a loss of external isolation, meaning the high-voltage battery is no longer properly electrically isolated from the vehicle chassis. The computer monitors isolation resistance between the high-voltage system and ground, and it sets this warning when that resistance drops below a safe threshold, creating a potential shock hazard.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

AreaHybrid propulsion

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.