B0710 code meaning
Sunroof Position Sensor Circuit
What B0710 means
Nothing public confirms B0710: it is missing from J2012 extracts, workshop manuals and recall bulletins alike. The title refers to the position feedback of a power sunroof. Typical designs count pulses from a Hall sensor at the motor shaft: Nedap's NL1001829C2 derives panel position and speed from the pole changes, and Bosch's DE19815960A1 resets such a counter at a mechanical stop and uses it to separate sliding from tilting travel. Without valid pulses neither the anti-trap function required by FMVSS 118 nor one-touch travel can work. In the 2011 Saab 9-5 the motor unit reports an unlearned calibration as B3697 4B; the 9-3 disables express operation with B3696 0B when the motor is misfitted or the mechanism blocked. Drive circuit: B0700.
B0710 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0710
- One-touch opening or closing no longer works
- Roof stops short of its end position or reverses unexpectedly
- Roof can only be moved step by step until reinitialised
Common causes of B0710
- Most likelyEnd positions not relearned after battery disconnection or motor replacement
- PossibleHall sensor or motor electronics faulty
- PossibleBinding mechanism or misfitted motor
- Less likelySignal wire or connector at the motor damaged
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Sunroof position sensorSunroof control module
What each part of B0710 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). |
| 10 | The exact fault in that area. |
What to do next
- Note B0710 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 B0710
What does B0710 mean?
B0710 means "Sunroof Position Sensor Circuit". Nothing public confirms B0710: it is missing from J2012 extracts, workshop manuals and recall bulletins alike. It is a generic code, so it means the same on every make.
Is it safe to drive with B0710?
B0710 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0710 fail an emissions test?
B0710 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 B0710 to fix?
Difficulty: medium. A typical repair takes 0.3 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will B0710 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.