U0151Lost Communication With Restraints Control Module
- Generic OBD-II code · Network
- Turns on the check-engine light
- How the car detects it
- U0151 means the airbag control module, which reads crash sensors and fires airbags and belt pretensioners, no longer reaches a listener. Names vary: GM and Saab say sensing and diagnostic module, FCA occupant restraint controller, Honda SRS unit. GM's 2025 ECM allows most of its messages a gap of about 10 s and rates the loss Type C without MIL; the brake controller reacts after 100 or 250 ms, also Type C. The airbag lamp is the usual warning. Exceptions exist: on the 2024 electric Dodge Charger U0151 comes with the MIL and a car stuck in Park until the controller gets new software (08-015-26). On 2008-10 Accords the gauge module sets it when the SRS unit has failed, covered by a 15-year warranty extension; on 2018-20 Mazda CX-3s a stalled head-up display blocked the CAN bus and left U0151 in the ABS unit.
- What you may notice
- Airbag warning lamp stays on
- Airbags may not deploy in a crash if the module has failed
- Several warning lamps or MIL on (Dodge Charger 2024)
- Scan tool cannot communicate with the airbag module
- Likely causes
- LikelyAirbag module fuse, ground or connector faulty (often under the seat or centre console)
- PossibleAirbag control module internally failed (Honda Accord 2008-10)
- PossibleAirbag module software needs updating (Dodge Charger 2024)
- RareAnother node blocks the bus, for example a faulty head-up display (Mazda CX-3)
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €60 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.