OBD Guide
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B1D27

Mirror Motor Common Control Circuit Low

B1D27 is an OBD-II diagnostic trouble code meaning: Mirror Motor Common Control Circuit Low. Common causes: open or short circuit in wiring harness, poor contact in connectors. Estimated repair cost: $56–167.

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

Symptoms

  • Mirrors don't work
  • Mirrors work intermittently
  • Mirrors do not respond to commands from the switch

Causes

  • Open or short circuit in wiring harness
  • Poor contact in connectors
  • Mirror motor malfunction
  • Body Control Module (BCM) Problems

How to Fix

  1. Check the wiring harness for breaks and short circuits
  2. Check contacts in connectors
  3. Check the voltage on the mirror motor
  4. Check the operation of the body control module (BCM)

Related codes

B1D26B1D28

FAQ

What does the B1D27 code mean?

B1D27 is an OBD-II diagnostic trouble code that indicates: Mirror Motor Common Control Circuit Low

What causes a B1D27 error code?

The most common causes of B1D27 include: Open or short circuit in wiring harness; Poor contact in connectors; Mirror motor malfunction; Body Control Module (BCM) Problems.

How do I fix a B1D27 diagnostic trouble code?

To fix B1D27: Check the wiring harness for breaks and short circuits. Check contacts in connectors. Check the voltage on the mirror motor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1D27?

Limited driving only, diagnose soon

How much does it cost to fix B1D27?

The estimated repair cost for B1D27 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat