OBD Guide
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B2511

Horn Output Relay Circuit Short To Battery

B2511 is an OBD-II diagnostic trouble code meaning: Horn Output Relay Circuit Short To Battery. Common causes: wiring harness damage, short circuit in relay control circuit. Estimated repair cost: $11–56.

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

Symptoms

  • Constant beep sound
  • No signal sound
  • Signal circuit fuse blown
  • Battery low

Causes

  • Wiring harness damage
  • Short circuit in relay control circuit
  • Faulty signal relay
  • Problems with the control unit
  • Damage to connectors

How to Fix

  1. Check signal circuit fuse
  2. Inspect the wiring harness for damage
  3. Check the operation of the signal relay
  4. Test the control circuit for a short circuit
  5. Check connectors and contacts
  6. Replace faulty components

Related codes

B2512B2513B2510

FAQ

What does the B2511 code mean?

B2511 is an OBD-II diagnostic trouble code that indicates: Horn Output Relay Circuit Short To Battery

What causes a B2511 error code?

The most common causes of B2511 include: Wiring harness damage; Short circuit in relay control circuit; Faulty signal relay; Problems with the control unit.

How do I fix a B2511 diagnostic trouble code?

To fix B2511: Check signal circuit fuse. Inspect the wiring harness for damage. Check the operation of the signal relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2511?

Limited driving only, diagnose soon

How much does it cost to fix B2511?

The estimated repair cost for B2511 is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat