OBD Guide
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B10C1

Left Front Unlock Pull Switch Signal Stuck High

B10C1 is an OBD-II diagnostic trouble code meaning: Left Front Unlock Pull Switch Signal Stuck High. Common causes: short circuit in wiring harness, door unlock switch malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Malfunction of the central locking of the left front door
  • The LED light on the unlock button does not work
  • The system may ignore commands to unlock the left front door
  • Possible false alarms

Causes

  • Short circuit in wiring harness
  • Door unlock switch malfunction
  • Contact problems or corrosion
  • Body Control Module (BCM) Malfunction

How to Fix

  1. Check wiring harness for damage or short circuit
  2. Test the door unlock switch
  3. Clean contacts from corrosion or oxides
  4. Check BCM operation
  5. If necessary, replace the switch or restore the integrity of the wiring harness

Related codes

B10C2B10C3

FAQ

What does the B10C1 code mean?

B10C1 is an OBD-II diagnostic trouble code that indicates: Left Front Unlock Pull Switch Signal Stuck High

What causes a B10C1 error code?

The most common causes of B10C1 include: Short circuit in wiring harness; Door unlock switch malfunction; Contact problems or corrosion; Body Control Module (BCM) Malfunction.

How do I fix a B10C1 diagnostic trouble code?

To fix B10C1: Check wiring harness for damage or short circuit. Test the door unlock switch. Clean contacts from corrosion or oxides. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B10C1?

Limited driving only, diagnose soon

How much does it cost to fix B10C1?

The estimated repair cost for B10C1 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat