OBD Guide

B3287

Left Rear Window Express Up or Down Circuit Low

B3287 is an OBD-II diagnostic trouble code meaning: Left Rear Window Express Up or Down Circuit Low. Common causes: open or shorted wiring harness, oxidation of contacts in connectors. Estimated repair cost: $22–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–167 (est.)

Symptoms

  • Automatic raising/lowering of the left rear window does not work
  • The glass moves jerkily or slower than usual
  • Intermittent operation of the window regulator

Causes

  • Open or shorted wiring harness
  • Oxidation of contacts in connectors
  • Window lift motor malfunction
  • Problems with the relay or control unit
  • Low voltage on-board network

How to Fix

  1. Check the condition of the wiring harness and contacts in the door transition
  2. Diagnose the voltage on the electric motor
  3. Check the performance of the electric motor
  4. Test the power window control unit
  5. If necessary, replace faulty components

Related codes

Error B3287 by Vehicle Brand

FAQ

What does the B3287 code mean?

B3287 is an OBD-II diagnostic trouble code that indicates: Left Rear Window Express Up or Down Circuit Low

What causes a B3287 error code?

The most common causes of B3287 include: Open or shorted wiring harness; Oxidation of contacts in connectors; Window lift motor malfunction; Problems with the relay or control unit.

How do I fix a B3287 diagnostic trouble code?

To fix B3287: Check the condition of the wiring harness and contacts in the door transition. Diagnose the voltage on the electric motor. Check the performance of the electric motor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B3287?

Limited driving only, diagnose soon

How much does it cost to fix B3287?

The estimated repair cost for B3287 is $22–167. Actual cost depends on your vehicle, location, and labor rates.

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