OBD Guide
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B106A

Rear Defrost Control Circuit Short To Battery

B106A is an OBD-II diagnostic trouble code meaning: Rear Defrost Control Circuit Short To Battery. Common causes: wiring harness damage, heating relay malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Heated rear window does not turn on
  • Heated rear window works constantly
  • Heating circuit fuse blown

Causes

  • Wiring harness damage
  • Heating relay malfunction
  • Short circuit in control circuit
  • Problems in the control unit

How to Fix

  1. Check wiring harness for damage
  2. Check the rear window heating relay
  3. Check control circuit for short circuit
  4. Check the control unit for malfunctions

Related codes

B106BB1069B1068

FAQ

What does the B106A code mean?

B106A is an OBD-II diagnostic trouble code that indicates: Rear Defrost Control Circuit Short To Battery

What causes a B106A error code?

The most common causes of B106A include: Wiring harness damage; Heating relay malfunction; Short circuit in control circuit; Problems in the control unit.

How do I fix a B106A diagnostic trouble code?

To fix B106A: Check wiring harness for damage. Check the rear window heating relay. Check control circuit for short circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B106A?

Limited driving only, diagnose soon

How much does it cost to fix B106A?

The estimated repair cost for B106A is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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