B3685
Movable Roof Header Latched Left Sensor Circuit
B3685 is an OBD-II diagnostic trouble code meaning: Movable Roof Header Latched Left Sensor Circuit. Common causes: open or short circuit in wiring harness, oxidized or damaged sensor contacts. Estimated repair cost: $56–167.
Symptoms
- The airbag malfunction indicator comes on
- Security error message on display
- The curtain airbag may not deploy in an accident.
Causes
- Open or short circuit in wiring harness
- Oxidized or damaged sensor contacts
- Faulty curtain fixation sensor
- Problems with the SRS control unit
How to Fix
- Run diagnostics on the SRS system to confirm the error.
- Visually inspect the wiring harness and sensor contacts
- Check the sensor resistance according to the manual
- Replace the sensor or restore circuit integrity if necessary
- Clear the error and check if it comes back
Related codes
Error B3685 by Vehicle Brand
FAQ
What does the B3685 code mean?
B3685 is an OBD-II diagnostic trouble code that indicates: Movable Roof Header Latched Left Sensor Circuit
What causes a B3685 error code?
The most common causes of B3685 include: Open or short circuit in wiring harness; Oxidized or damaged sensor contacts; Faulty curtain fixation sensor; Problems with the SRS control unit.
How do I fix a B3685 diagnostic trouble code?
To fix B3685: Run diagnostics on the SRS system to confirm the error.. Visually inspect the wiring harness and sensor contacts. Check the sensor resistance according to the manual. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3685?
Do not drive — repair immediately
How much does it cost to fix B3685?
The estimated repair cost for B3685 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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