What does code P0B33 mean?

Q: What does code P0B33 mean?

High Voltage Service Disconnect Circuit. P0B33 indicates that the high-voltage service disconnect circuit has been detected as having a voltage higher than expected, which typically means the battery energy control module (BECM) or a related controller has seen an abnormally high voltage on the service disconnect detection circuit. The service disconnect is a safety device that isolates the high-voltage battery from the rest of the vehicle during maintenance or emergencies, and this code sets when the monitoring circuit reports a voltage above the normal threshold.

DTC codes / P0Bxx · Hybrid propulsion / P0B33

P0B33High Voltage Service Disconnect Circuit

P0B33 indicates that the high-voltage service disconnect circuit has been detected as having a voltage higher than expected, which typically means the battery energy control module (BECM) or a related controller has seen an abnormally high voltage on the service disconnect detection circuit. The service disconnect is a safety device that isolates the high-voltage battery from the rest of the vehicle during maintenance or emergencies, and this code sets when the monitoring circuit reports a voltage above the normal threshold.

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.