OBD Guide
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B1272

Servo Motor Potentiometer Vent Circuit Failure

B1272 is an OBD-II diagnostic trouble code meaning: Servo Motor Potentiometer Vent Circuit Failure. Common causes: open or short circuit in wiring harness, servo motor potentiometer malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect operation of the ventilation system
  • Check Engine light comes on
  • Reduced climate control efficiency

Causes

  • Open or short circuit in wiring harness
  • Servo motor potentiometer malfunction
  • Damage to the servomotor
  • Problems with the control unit

How to Fix

  1. Check wiring harness for damage
  2. Check potentiometer resistance
  3. Check the operation of the servomotor
  4. Replace faulty components

Related codes

B1271B1273

FAQ

What does the B1272 code mean?

B1272 is an OBD-II diagnostic trouble code that indicates: Servo Motor Potentiometer Vent Circuit Failure

What causes a B1272 error code?

The most common causes of B1272 include: Open or short circuit in wiring harness; Servo motor potentiometer malfunction; Damage to the servomotor; Problems with the control unit.

How do I fix a B1272 diagnostic trouble code?

To fix B1272: Check wiring harness for damage. Check potentiometer resistance. Check the operation of the servomotor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1272?

Limited driving only, diagnose soon

How much does it cost to fix B1272?

The estimated repair cost for B1272 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat