OBD Guide
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B1D03

Right High Beam Circuit Short

B1D03 is an OBD-II diagnostic trouble code meaning: Right High Beam Circuit Short. Common causes: wiring harness damage, relay fault. Estimated repair cost: $22–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–111 (est.)

Symptoms

  • The right high beam headlight does not work
  • Fuse blown
  • Flashing headlights

Causes

  • Wiring harness damage
  • Relay fault
  • Short circuit in headlight
  • Problems with the lighting control unit

How to Fix

  1. Check the high beam circuit fuse
  2. Inspect the wiring harness for damage
  3. Check headlight relay
  4. Diagnose the lighting control unit
  5. Replace faulty components

Related codes

B1D02B1D04

FAQ

What does the B1D03 code mean?

B1D03 is an OBD-II diagnostic trouble code that indicates: Right High Beam Circuit Short

What causes a B1D03 error code?

The most common causes of B1D03 include: Wiring harness damage; Relay fault; Short circuit in headlight; Problems with the lighting control unit.

How do I fix a B1D03 diagnostic trouble code?

To fix B1D03: Check the high beam circuit fuse. Inspect the wiring harness for damage. Check headlight relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1D03?

Limited driving only, diagnose soon

How much does it cost to fix B1D03?

The estimated repair cost for B1D03 is $22–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat