OBD Guide
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B237F

Horn Mute Request Circuit High

B237F is an OBD-II diagnostic trouble code meaning: Horn Mute Request Circuit High. Common causes: short circuit in wiring harness, faulty horn relay. Estimated repair cost: $56–167.

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

Symptoms

  • The sound signal does not work
  • The sound signal works continuously
  • False alarms

Causes

  • Short circuit in wiring harness
  • Faulty horn relay
  • Wiring damage
  • Control unit malfunction
  • Problems with the horn button on the steering wheel

How to Fix

  1. Check the integrity of the wiring harness in the horn circuit
  2. Check horn relay
  3. Check the horn button on the steering wheel
  4. Check voltage on trip request circuit
  5. Replace damaged components if necessary

Related codes

B237EB2380

FAQ

What does the B237F code mean?

B237F is an OBD-II diagnostic trouble code that indicates: Horn Mute Request Circuit High

What causes a B237F error code?

The most common causes of B237F include: Short circuit in wiring harness; Faulty horn relay; Wiring damage; Control unit malfunction.

How do I fix a B237F diagnostic trouble code?

To fix B237F: Check the integrity of the wiring harness in the horn circuit. Check horn relay. Check the horn button on the steering wheel. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B237F?

Limited driving only, diagnose soon

How much does it cost to fix B237F?

The estimated repair cost for B237F is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat