OBD Guide
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B2521

Roof Close Switch Right Malfunction

B2521 is an OBD-II diagnostic trouble code meaning: Roof Close Switch Right Malfunction. Common causes: faulty roof closing switch on the right, open or short circuit in control circuit. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Automatic closing of the roof on the right side does not work
  • The roof stops or moves jerkily
  • Roof operation indicator flashes
  • The roof system does not respond to commands

Causes

  • Faulty roof closing switch on the right
  • Open or short circuit in control circuit
  • Oxidation of contacts in connectors
  • Wiring Harness Problems
  • Roof control unit malfunction

How to Fix

  1. Check the operation of the switch manually
  2. Inspect connectors and contacts for damage
  3. Test the control circuit for open/short circuit
  4. Check the resistance of the switch
  5. If necessary, replace the switch or repair the wiring
  6. Reset the error and check the system operation

Related codes

B2520B2522B2523

FAQ

What does the B2521 code mean?

B2521 is an OBD-II diagnostic trouble code that indicates: Roof Close Switch Right Malfunction

What causes a B2521 error code?

The most common causes of B2521 include: Faulty roof closing switch on the right; Open or short circuit in control circuit; Oxidation of contacts in connectors; Wiring Harness Problems.

How do I fix a B2521 diagnostic trouble code?

To fix B2521: Check the operation of the switch manually. Inspect connectors and contacts for damage. Test the control circuit for open/short circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2521?

Limited driving only, diagnose soon

How much does it cost to fix B2521?

The estimated repair cost for B2521 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat