OBD Guide
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B2861

Mirror Approach Light Control Circuit

B2861 is an OBD-II diagnostic trouble code meaning: Mirror Approach Light Control Circuit. Common causes: open or short circuit in wiring harness, malfunction of the backlight control unit. Estimated repair cost: $6–56.

Severity
✅ Low
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–56 (est.)

Symptoms

  • No mirror illumination when approaching
  • Backlight flashing
  • Backlight won't turn off

Causes

  • Open or short circuit in wiring harness
  • Malfunction of the backlight control unit
  • Damage to backlight LEDs
  • Contact corrosion

How to Fix

  1. Check wiring harness for damage
  2. Check contacts for corrosion
  3. Replace faulty LEDs
  4. Replace the backlight control unit

Related codes

B2860B2862

FAQ

What does the B2861 code mean?

B2861 is an OBD-II diagnostic trouble code that indicates: Mirror Approach Light Control Circuit

What causes a B2861 error code?

The most common causes of B2861 include: Open or short circuit in wiring harness; Malfunction of the backlight control unit; Damage to backlight LEDs; Contact corrosion.

How do I fix a B2861 diagnostic trouble code?

To fix B2861: Check wiring harness for damage. Check contacts for corrosion. Replace faulty LEDs. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2861?

Do not drive — repair immediately

How much does it cost to fix B2861?

The estimated repair cost for B2861 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat