OBD Guide
ENFRDEESPT

B2321

Mirror Driver Horizontal Feedback Potentiometer Circuit Open

B2321 is an OBD-II diagnostic trouble code meaning: Mirror Driver Horizontal Feedback Potentiometer Circuit Open. Common causes: broken or damaged wiring harness, oxidation of potentiometer contacts. Estimated repair cost: $22–89.

Severity
✅ Low
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–89 (est.)

Symptoms

  • The mirror does not remember the position
  • Inability to adjust the mirror from the control unit
  • Spontaneous change in mirror position

Causes

  • Broken or damaged wiring harness
  • Oxidation of potentiometer contacts
  • Potentiometer fault
  • Problems with the mirror control unit

How to Fix

  1. Check the integrity of the mirror wiring harness
  2. Check the potentiometer contacts for oxidation
  3. Ring the potentiometer circuit
  4. Check the operation of the potentiometer
  5. Replace potentiometer or wiring harness if necessary

Related codes

B2320B2322B2323

FAQ

What does the B2321 code mean?

B2321 is an OBD-II diagnostic trouble code that indicates: Mirror Driver Horizontal Feedback Potentiometer Circuit Open

What causes a B2321 error code?

The most common causes of B2321 include: Broken or damaged wiring harness; Oxidation of potentiometer contacts; Potentiometer fault; Problems with the mirror control unit.

How do I fix a B2321 diagnostic trouble code?

To fix B2321: Check the integrity of the mirror wiring harness. Check the potentiometer contacts for oxidation. Ring the potentiometer circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2321?

Do not drive — repair immediately

How much does it cost to fix B2321?

The estimated repair cost for B2321 is $22–89. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat