VOLVO
SRS-B00121B - Passenger Frontal Stage 3 Deployment Control. General Electrical Failures. Circuit resistance above threshold
System
Supplemental Restraint System (SRS)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The SRS measures resistance in the stage 3 passenger airbag circuit. A resistance that stays too high for too long means a break in the wire or airbag, or high contact resistance at the connections.
Possible causes
- Break in the wire
- Contact resistance at the connections
- Open circuit in the stage 3 passenger airbag, where the igniter resistance is too high
What you can do
- 1Read and clear the code, test drive and see whether it comes back
- 2Have a workshop check the connections and wire for loose contacts, oxidation and breaks
- 3If the wire is intact, have a workshop replace the stage 3 passenger airbag
- 4Only a workshop should work on the airbag system
Symptoms you may notice2
- SRS warning lamp on
- An SRS warning message is shown
General guidance for car owners. Diagnosis on the car can point to a different cause.