What does code P0B37 mean?

Q: What does code P0B37 mean?

High Voltage Service Disconnect Open. P0B37 indicates that the high-voltage service disconnect circuit has been detected as open when the battery energy control module expected it to be closed, meaning the high-voltage path is interrupted. The computer monitors the voltage or continuity across the service disconnect switch and sets this code when the signal falls outside the expected range for the high-voltage interlock loop.

DTC codes / P0Bxx · Hybrid propulsion / P0B37

P0B37High Voltage Service Disconnect Open

P0B37 indicates that the high-voltage service disconnect circuit has been detected as open when the battery energy control module expected it to be closed, meaning the high-voltage path is interrupted. The computer monitors the voltage or continuity across the service disconnect switch and sets this code when the signal falls outside the expected range for the high-voltage interlock loop.

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.