B0048 code meaning
Third Row Right Side Airbag Deployment Control
What B0048 means
B0048 is the right-hand counterpart of B0040: the deployment loop of a side airbag for the right seat in a third row. Few vehicles have one, because the third row usually relies on a curtain that reaches back to the D-pillar. Patent literature covers the hardware: Joyson's seatback side module is described for any seating row including the third, and GM's application treats each rear row as a separate system with its own generator that may stay idle when another fires. No manufacturer documents B0048, and NHTSA holds no bulletin with it. For a second-row right side bag, Mitsubishi shows the usual logic under B0038, a fault confirmed after 2 seconds. Airbag lamp on.
B0048 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0048
- Airbag warning lamp on
- Right third-row occupant may lack side airbag protection
- Safety note: do not probe the airbag circuit yourself; unplug airbag connectors only with the battery disconnected and the stated wait time observed
Common causes of B0048
- Most likelyPoor contact at the third-row right side airbag connector
- PossibleLead damaged by folding, sliding or removing the third-row seat
- Less likelyRestraint module configured for equipment the vehicle does not have (wrong part or coding)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Third row right side airbagSquib circuitSRS wiringSRS control module
What each part of B0048 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 48 | The exact fault in that area. |
What to do next
- Note B0048 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B0048
What does B0048 mean?
B0048 means "Third Row Right Side Airbag Deployment Control". B0048 is the right-hand counterpart of B0040: the deployment loop of a side airbag for the right seat in a third row. It is a generic code, so it means the same on every make.
Is it safe to drive with B0048?
B0048 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0048 fail an emissions test?
B0048 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B0048 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will B0048 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.