What does code B0077 mean?

Q: What does code B0077 mean?

Driver Seatbelt Pretensioner Resistance High. B0077 indicates that the restraint control module has measured excessive resistance in the driver seatbelt pretensioner circuit, which is the pyrotechnic device that retracts the belt during a crash. The module monitors the circuit's resistance and flags this code when the reading exceeds the expected range, typically due to a poor connection, damaged wiring, or an open squib.

DTC codes / B00xx · Airbags, seats, doors, lights and comfort systems / B0077

B0077Driver Seatbelt Pretensioner Resistance High

B0077 indicates that the restraint control module has measured excessive resistance in the driver seatbelt pretensioner circuit, which is the pyrotechnic device that retracts the belt during a crash. The module monitors the circuit's resistance and flags this code when the reading exceeds the expected range, typically due to a poor connection, damaged wiring, or an open squib.

SystemBody

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

AreaAirbags, seats, doors, lights and comfort systems

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