OBD Guide
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B13A6

LDWS Switch Circuit Malfunction

B13A6 is an OBD-II diagnostic trouble code meaning: LDWS Switch Circuit Malfunction. Common causes: ldws switch failure, broken or damaged wiring harness. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • LDWS indicator light on dashboard
  • LDWS system is inactive or not working correctly
  • No lane departure warnings

Causes

  • LDWS switch failure
  • Broken or damaged wiring harness
  • Poor contact in connectors
  • Software error in LDWS module

How to Fix

  1. Check the LDWS switch for mechanical damage
  2. Inspect the wiring harness and connectors for damage or corrosion.
  3. Check the voltage and resistance in the switch circuit
  4. If necessary, replace the switch or repair the wiring harness

Related codes

B13A7B13A8U0121

FAQ

What does the B13A6 code mean?

B13A6 is an OBD-II diagnostic trouble code that indicates: LDWS Switch Circuit Malfunction

What causes a B13A6 error code?

The most common causes of B13A6 include: LDWS switch failure; Broken or damaged wiring harness; Poor contact in connectors; Software error in LDWS module.

How do I fix a B13A6 diagnostic trouble code?

To fix B13A6: Check the LDWS switch for mechanical damage. Inspect the wiring harness and connectors for damage or corrosion.. Check the voltage and resistance in the switch circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B13A6?

Do not drive — repair immediately

How much does it cost to fix B13A6?

The estimated repair cost for B13A6 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat