OBD Guide
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B1268

Servo Motor Potentiometer Defrost Circuit Failure

B1268 is an OBD-II diagnostic trouble code meaning: Servo Motor Potentiometer Defrost Circuit Failure. Common causes: open or short circuit in wiring harness, potentiometer fault. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect operation of the heating system
  • No heating
  • Flashing fault indicator on the instrument panel

Causes

  • Open or short circuit in wiring harness
  • Potentiometer fault
  • Servomotor problems
  • Circuit voltage low

How to Fix

  1. Check the integrity of the wiring harness
  2. Diagnose servo motor potentiometer
  3. Check the operation of the servomotor
  4. If necessary, replace faulty components

Related codes

B1267B1269

FAQ

What does the B1268 code mean?

B1268 is an OBD-II diagnostic trouble code that indicates: Servo Motor Potentiometer Defrost Circuit Failure

What causes a B1268 error code?

The most common causes of B1268 include: Open or short circuit in wiring harness; Potentiometer fault; Servomotor problems; Circuit voltage low.

How do I fix a B1268 diagnostic trouble code?

To fix B1268: Check the integrity of the wiring harness. Diagnose servo motor potentiometer. Check the operation of the servomotor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1268?

Do not drive — repair immediately

How much does it cost to fix B1268?

The estimated repair cost for B1268 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat