Code B0055 indicates a malfunction in the circuit for the second-row right seat belt sensor. The SRS (Supplemental Restraint System) module has detected an electrical fault, such as an open circuit or short, preventing it from verifying if the passenger is buckled.
The internal electrical switch within the seat belt buckle has worn out or failed mechanically.
Spilled liquids or debris inside the buckle housing interfering with the sensor's electrical contact.
Frayed or broken wires under the seat caused by seat adjustment, passenger movement, or debris.
The wiring harness connector at the buckle or the junction under the seat has become unplugged or loose.
An internal circuit failure within the SRS control module.
The definition is universal; the diagnostics are engine-specific. Open your vehicle for the codes documented for it:
In most vehicles, the sensor is integrated into the buckle assembly, meaning the entire buckle unit must be replaced.
The vehicle is generally drivable, but the SRS system may not function correctly for the passenger in that specific seat during an accident.
No. It is highly uncommon for the control module to be the cause of a single sensor circuit fault; the problem is almost always located in the buckle or the wiring.