B0047 code meaning
Left Curtain Deployment Loop Short to Ground
What B0047 means
B0047 is missing from the accessible J2012 lists as well, and no vehicle maker or NHTSA bulletin documents it, so it is not publicly traceable. The title names a grounded left curtain airbag loop; this inflatable curtain covers the side windows in side impacts and rollovers. Under J2012 this fault is normally stored as B0021 with byte 11: Mitsubishi sets B0021-11 once the left curtain circuit has been grounded for 2 seconds. GM Global A uses B0016 02 for a grounded left roof rail airbag loop, also after 2 seconds. A grounded lead often sits where the roof harness passes sharp body edges or trim clips. Airbag lamp on.
B0047 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0047
- Airbag warning lamp on
- Left curtain airbag deployment may be blocked
- 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 B0047
- Most likelyInsulation of the curtain lead chafed through against the body
- PossibleLead pinched by a pillar trim or headliner clip
- Less likelyInternal short to housing in the left curtain airbag
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Left curtain airbagSRS roof wiringSRS control module
What each part of B0047 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). |
| 47 | The exact fault in that area. |
What to do next
- Note B0047 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 B0047
What does B0047 mean?
B0047 means "Left Curtain Deployment Loop Short to Ground". B0047 is missing from the accessible J2012 lists as well, and no vehicle maker or NHTSA bulletin documents it, so it is not publicly traceable. It is a generic code, so it means the same on every make.
Is it safe to drive with B0047?
B0047 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0047 fail an emissions test?
B0047 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 B0047 to fix?
Difficulty: workshop only. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will B0047 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.