B0152 code meaning
Driver Buckle Switch Circuit Malfunction
What B0152 means
B0152 appears in no J2012 code list and in no public carmaker document. In J2012 the driver's buckle sensor is B0050, so the title duplicates that code. The switch tells the vehicle whether the tongue is latched. TRW's patent US5898366A places a Hall device, a magnet and an armature in the buckle, and the latch movement changes the flux and thus the output; US5966784A uses a flux reversal for the same purpose and adds that the signal can steer airbag deployment. FMVSS 208 S7.3 requires a driver belt warning: a lamp and a 4 to 8 second chime, or a lamp lasting at least 60 seconds. A circuit fault can leave the reminder on with the belt fastened, or silent without it.
B0152 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0152
- Belt reminder for the driver stays on or does not come on
- Airbag warning lamp on in vehicles that read the buckle in the airbag module
- Safety note: the buckle plug sits under the seat near airbag and pretensioner plugs; unplug only with the battery off and the wait time observed
Common causes of B0152
- Most likelyBuckle plug under the driver seat loose or corroded
- PossibleBuckle lead pinched or broken by seat movement
- PossibleHall sensor or contact in the buckle defective, buckle must be replaced
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Seat belt buckle switchSRS seat wiringSRS control module
What each part of B0152 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). |
| 52 | The exact fault in that area. |
What to do next
- Note B0152 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 B0152
What does B0152 mean?
B0152 means "Driver Buckle Switch Circuit Malfunction". B0152 appears in no J2012 code list and in no public carmaker document. It is a generic code, so it means the same on every make.
Is it safe to drive with B0152?
B0152 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0152 fail an emissions test?
B0152 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 B0152 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will B0152 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.