OBD Guide
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B19A9

Rear Window Motor Output Circuit Failure

B19A9 is an OBD-II diagnostic trouble code meaning: Rear Window Motor Output Circuit Failure. Common causes: open or short circuit in wiring harness, drive relay fault. Estimated repair cost: $22–167.

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

Symptoms

  • Rear window doesn't work
  • Rear window intermittent operation
  • Relay clicks without glass movement

Causes

  • Open or short circuit in wiring harness
  • Drive relay fault
  • Oxidation of contacts
  • Failure of the window lift motor
  • Problems with the control unit

How to Fix

  1. Check circuit fuse
  2. Inspect the wiring harness for damage
  3. Check relay operation
  4. Test the window lift motor
  5. Check contacts and connections

Related codes

B19A8B19AAB19AB

FAQ

What does the B19A9 code mean?

B19A9 is an OBD-II diagnostic trouble code that indicates: Rear Window Motor Output Circuit Failure

What causes a B19A9 error code?

The most common causes of B19A9 include: Open or short circuit in wiring harness; Drive relay fault; Oxidation of contacts; Failure of the window lift motor.

How do I fix a B19A9 diagnostic trouble code?

To fix B19A9: Check circuit fuse. Inspect the wiring harness for damage. Check relay operation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B19A9?

Limited driving only, diagnose soon

How much does it cost to fix B19A9?

The estimated repair cost for B19A9 is $22–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat