OBD Guide
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B16A3

Passenger Window Switch Backlighting Circuit Short

B16A3 is an OBD-II diagnostic trouble code meaning: Passenger Window Switch Backlighting Circuit Short. Common causes: damage to the wires in the backlight circuit, passenger window switch malfunction. Estimated repair cost: $11–56.

Severity
✅ Low
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$11–56 (est.)

Symptoms

  • Passenger window switch light not working
  • Fuse blown
  • There may be problems with the operation of the window switch itself

Causes

  • Damage to the wires in the backlight circuit
  • Passenger window switch malfunction
  • Problems in the wiring harness
  • Short circuit in the control unit

How to Fix

  1. Check the fuse associated with the backlight circuit
  2. Inspect the wires and wiring harness for damage
  3. Check the passenger window switch for malfunction.
  4. If necessary, replace the switch or damaged wires

Related codes

B16A2B16A4

FAQ

What does the B16A3 code mean?

B16A3 is an OBD-II diagnostic trouble code that indicates: Passenger Window Switch Backlighting Circuit Short

What causes a B16A3 error code?

The most common causes of B16A3 include: Damage to the wires in the backlight circuit; Passenger window switch malfunction; Problems in the wiring harness; Short circuit in the control unit.

How do I fix a B16A3 diagnostic trouble code?

To fix B16A3: Check the fuse associated with the backlight circuit. Inspect the wires and wiring harness for damage. Check the passenger window switch for malfunction.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B16A3?

Limited driving only, diagnose soon

How much does it cost to fix B16A3?

The estimated repair cost for B16A3 is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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