B0064 code meaning
Driver Seat Belt Pretensioner Deployment Loop Resistance Low
What B0064 means
No publicly available J2012 code list includes B0064; there, B0060 names the driver belt tension sensor. Older airbag modules from General Motors do use it: on the 2006 Saab 9-5, B0064 is set when the resistance of the driver pretensioner loop stays below 1.5 ohms, with a 0.2-ohm tolerance, for 2 seconds; B0065 marks an interrupted loop and B0066 a voltage at pin 34 outside 1.0 to 4.1 V. Saab 9-3 manuals of 2003 and 2007 describe the same fault as too little resistance at the driver's belt tensioner. The module still attempts to fire the pretensioner in a crash. GM bulletin 14609 names B0064 among the codes caused by fatigue breaks in the rear door harness of Colorado and Canyon extended cab trucks, model years 2004 to 2009. Airbag lamp on.
B0064 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 B0064
- Airbag warning lamp on
- Driver belt pretensioner may not work properly in a crash
- Safety note: pretensioner plugs sit at the B-pillar or under the seat; do not probe the loop and only unplug them with the battery disconnected and the wait time observed
Common causes of B0064
- Most likelyPretensioner leads shorted together, e.g. squashed harness at the B-pillar
- PossibleColorado/Canyon extended cab: fatigued wires in the rear door harness (bulletin 14609)
- PossibleDamaged or contaminated pretensioner connector
- Less likelyInternal fault of the driver pretensioner squib
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Driver seatbelt pretensionerSRS seat wiringSRS control module
What each part of B0064 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). |
| 64 | The exact fault in that area. |
What to do next
- Note B0064 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 B0064
What does B0064 mean?
B0064 means "Driver Seat Belt Pretensioner Deployment Loop Resistance Low". No publicly available J2012 code list includes B0064; there, B0060 names the driver belt tension sensor. It is a generic code, so it means the same on every make.
Is it safe to drive with B0064?
B0064 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0064 fail an emissions test?
B0064 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 B0064 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will B0064 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.