Faulty sunroof position sensor (hall-effect or potentiometer type); Damaged or disconnected wiring harness at the sunroof motor assembly; Corroded or loose electrical connector at the sensor or BCM; Failed sunroof motor/module assembly with integrated sensor; Mechanical binding or obstruction in the sunroof track causing implausible sensor readings; Water intrusion into the sunroof housing or connector; BCM internal fault or software issue (less common)

DTC codes / B07xx · Airbags, seats, doors, lights and comfort systems / B0710

B0710Sunroof Position Sensor Circuit

Q: What does code B0710 mean?

Sunroof Position Sensor Circuit. B0710 indicates that the body control module (BCM) has detected a fault in the sunroof position sensor circuit, which is responsible for reporting the exact glass panel location to the controller. The computer compares the sensor signal against expected values and sets this code when the voltage or signal pattern falls outside the normal range.

B0710 indicates that the body control module (BCM) has detected a fault in the sunroof position sensor circuit, which is responsible for reporting the exact glass panel location to the controller. The computer compares the sensor signal against expected values and sets this code when the voltage or signal pattern falls outside the normal range.

SystemBody

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

Sunroof may not open, close, or stop at the requested position
Sunroof may reverse direction unexpectedly during operation
Sunroof may be inoperative from the switch
Water leaks or wind noise due to improper sealing from a mispositioned panel
Often no symptoms besides the warning light

Common causes, most likely first

Faulty sunroof position sensor (hall-effect or potentiometer type)
Damaged or disconnected wiring harness at the sunroof motor assembly
Corroded or loose electrical connector at the sensor or BCM
Failed sunroof motor/module assembly with integrated sensor
Mechanical binding or obstruction in the sunroof track causing implausible sensor readings
Water intrusion into the sunroof housing or connector
BCM internal fault or software issue (less common)

How to diagnose and fix it

Verify battery voltage and inspect the sunroof fuse; a weak battery can cause false position codes
Visually inspect the sunroof tracks and glass for obstructions, debris, or misalignment that could bind the mechanism
Disconnect the sunroof motor/sensor connector and check for corrosion, water intrusion, or loose pins
Backprobe the sensor signal wire at the motor connector and observe voltage while manually moving the sunroof (or using a scan tool to command movement) to confirm the sensor output changes smoothly
Check continuity and resistance of the sensor wiring between the motor and BCM, looking for opens or shorts
If the sensor signal is erratic or absent with good wiring, replace the sunroof motor/sensor assembly as a unit
After repair, clear the code and perform a sunroof normalization/calibration procedure with a scan tool if required by the manufacturer

Before you replace the sunroof motor

A weak or failing battery is a common cause of false sunroof position codes because the BCM may lose its learned position when voltage drops during cranking.
Many sunroof position sensors are integrated into the motor assembly and cannot be replaced separately, so testing the signal at the connector is critical before condemning the motor.
Mechanical binding in the tracks can mimic a sensor failure by causing the motor to draw excess current and the sensor to report implausible positions; always inspect and lubricate the tracks first.
After replacing the motor or sensor, a calibration or normalization procedure is often required, and skipping it will cause the code to return immediately.
Water leaks from clogged sunroof drains can corrode the sensor connector and set this code without any obvious sunroof operation problem.

Can I keep driving with B0710?

The vehicle remains safe to drive because the sunroof is a comfort feature and does not affect steering, braking, or powertrain operation. Avoid operating the sunroof until repaired to prevent mechanical damage or water intrusion from a partially open panel.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.