OBD Guide
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B1345

Heated Backlite Input Circuit Short to Ground

B1345 is an OBD-II diagnostic trouble code meaning: Heated Backlite Input Circuit Short to Ground. Common causes: wiring harness damage, heating relay malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Heated rear window does not work
  • Fuse blown
  • Check Engine light comes on

Causes

  • Wiring harness damage
  • Heating relay malfunction
  • Short circuit in the heating element
  • Body Control Module (BCM) Problems

How to Fix

  1. Check the heating circuit fuse
  2. Inspect the wiring harness for damage
  3. Check the rear window heating relay
  4. Diagnose the heating element for a short circuit
  5. If necessary, replace faulty components

Related codes

B1346B1347B1348

FAQ

What does the B1345 code mean?

B1345 is an OBD-II diagnostic trouble code that indicates: Heated Backlite Input Circuit Short to Ground

What causes a B1345 error code?

The most common causes of B1345 include: Wiring harness damage; Heating relay malfunction; Short circuit in the heating element; Body Control Module (BCM) Problems.

How do I fix a B1345 diagnostic trouble code?

To fix B1345: Check the heating circuit fuse. Inspect the wiring harness for damage. Check the rear window heating relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1345?

Limited driving only, diagnose soon

How much does it cost to fix B1345?

The estimated repair cost for B1345 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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