OBD Guide
ENFRDEESPT

B251B

Left Rear Window Incorrect Direction

B251B is an OBD-II diagnostic trouble code meaning: Left Rear Window Incorrect Direction. Common causes: malfunction of the window lift mechanism, wiring harness problems. Estimated repair cost: $56–167.

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

Symptoms

  • Wrong direction of glass movement (up instead of down or vice versa)
  • Intermittent operation of the window regulator
  • The glass doesn't move

Causes

  • Malfunction of the window lift mechanism
  • Wiring Harness Problems
  • Malfunction of the power window control unit
  • Incorrect position sensor calibration

How to Fix

  1. Check the window lift mechanism for damage
  2. Check the integrity of the wiring harness
  3. Check the operation of the power window control unit
  4. Calibrate position sensors

Related codes

B251AB251CB251D

FAQ

What does the B251B code mean?

B251B is an OBD-II diagnostic trouble code that indicates: Left Rear Window Incorrect Direction

What causes a B251B error code?

The most common causes of B251B include: Malfunction of the window lift mechanism; Wiring Harness Problems; Malfunction of the power window control unit; Incorrect position sensor calibration.

How do I fix a B251B diagnostic trouble code?

To fix B251B: Check the window lift mechanism for damage. Check the integrity of the wiring harness. Check the operation of the power window control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B251B?

Limited driving only, diagnose soon

How much does it cost to fix B251B?

The estimated repair cost for B251B is $56–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat