B0700 code meaning
Sunroof Open/Close Circuit
What B0700 means
No accessible J2012 list, public manufacturer manual or NHTSA bulletin contains B0700, so the code cannot be verified. Its title points to the circuit that drives a power sunroof open and shut. GM-era Saab cars report such faults under their own numbers: the 9-3 sunroof module stores B3661 0E when motor current is too high and B3664 04 for an open switch line, after which button presses are ignored; B3664 0A follows if the same switch position is seen for over 30 s. In the 2011 Saab 9-5 the module reads the switch as a resistor ladder and reports B3664 to the BCM via LIN. FMVSS 118 demands that a closing roof panel reverses before it squeezes with 100 N, which is why motor current is supervised at all. Position feedback: B0710.
B0700 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0700
- Sunroof does not move when the button is pressed
- Roof stops or reverses on its own while closing
- Motor hums without the panel moving
Common causes of B0700
- Most likelyDirty or dry guide rails raising motor current
- PossibleSunroof switch or its wiring faulty
- PossibleSunroof motor or gearbox worn
- Less likelySunroof control electronics faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Sunroof motorSunroof control module
What each part of B0700 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). |
| 00 | The exact fault in that area. |
What to do next
- Note B0700 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 B0700
What does B0700 mean?
B0700 means "Sunroof Open/Close Circuit". No accessible J2012 list, public manufacturer manual or NHTSA bulletin contains B0700, so the code cannot be verified. It is a generic code, so it means the same on every make.
Is it safe to drive with B0700?
B0700 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0700 fail an emissions test?
B0700 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 B0700 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will B0700 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.