OBD Guide
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B18B6

Master Switch Front Right Window Switch

B18B6 is an OBD-II diagnostic trouble code meaning: Master Switch Front Right Window Switch. Common causes: worn or damaged main switch, open or short circuit in wiring harness. Estimated repair cost: $56–167.

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

Symptoms

  • The right front power window does not work from the main switch
  • Intermittent operation of the window regulator
  • No response when pressing the switch

Causes

  • Worn or damaged main switch
  • Open or short circuit in wiring harness
  • Power or grounding problems
  • Malfunction of the power window control module

How to Fix

  1. Check the operation of the switch
  2. Check the integrity of the wiring harness
  3. Check power and grounding
  4. Replace main switch if necessary

Related codes

B18B5B18B7B18B8

FAQ

What does the B18B6 code mean?

B18B6 is an OBD-II diagnostic trouble code that indicates: Master Switch Front Right Window Switch

What causes a B18B6 error code?

The most common causes of B18B6 include: Worn or damaged main switch; Open or short circuit in wiring harness; Power or grounding problems; Malfunction of the power window control module.

How do I fix a B18B6 diagnostic trouble code?

To fix B18B6: Check the operation of the switch. Check the integrity of the wiring harness. Check power and grounding. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B18B6?

Do not drive — repair immediately

How much does it cost to fix B18B6?

The estimated repair cost for B18B6 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat