What does it mean?
B1454 is a Body (airbags, seat belts, body electronics) fault code. It indicates: SIS (Side Impact Sensor) Rear-Passenger Circuit Short to Ground .
Symptoms
- Airbag/SRS warning lamp stays illuminated
- Passenger-side side and curtain airbag protection is disabled
- Pretensioner on the same side may be switched off as well
- Fault often becomes permanent in wet weather or after the boot has been loaded and unloaded
- Clearing the code has no lasting effect while the short is present
Likely causes
- Harness rubbing through against a sill edge, body seam or seat mounting in the rear of the cabin
- Moisture reaching the connector from a leaking door seal, a sunroof drain or wet carpet on the passenger side
- Wiring cut or crushed during rear seat removal, boot lining work or an audio installation
- Corroded sensor connector allowing the signal to leak to the mounting bracket
- Internal failure of the rear passenger-side impact sensor
- Short to ground inside the airbag control unit connector or its input circuit
How to fix it
- Read the SRS codes and check whether both rear sensors or only this one are reporting
- Power down properly: ignition off, battery disconnected, prescribed waiting time observed
- Unplug the rear passenger-side impact sensor and measure resistance from each signal wire to chassis ground; a low value with the sensor unplugged points to the harness
- Lift the sill and rear trim and inspect the loom for chafe, cuts, staples and crushed sections, paying attention to any recent interior work
- Check the connector, its seal and the carpet beneath it for water, and correct the leak that caused it
- Repeat the ground measurement at the airbag control unit connector to decide between harness and module
- Repair the harness using an approved method for SRS wiring, then refit and retest before considering a new sensor
- Clear the codes and confirm the lamp performs its bulb check and goes out