OBD Guide
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B1897

Horn Switch Circuit Failure

B1897 is an OBD-II diagnostic trouble code meaning: Horn Switch Circuit Failure. Common causes: open horn switch circuit, short circuit in the circuit. Estimated repair cost: $11–56.

Severity
✅ Low
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$11–56 (est.)

Symptoms

  • The sound signal does not work
  • The sound signal does not work correctly (for example, it turns on spontaneously)
  • Check Engine light comes on

Causes

  • Open horn switch circuit
  • Short circuit in the circuit
  • Horn switch malfunction
  • Wiring harness damage
  • Contact corrosion

How to Fix

  1. Check the continuity of the horn switch circuit
  2. Check the condition of the contacts and wiring harness
  3. Replace the horn switch if necessary
  4. Clean contacts from corrosion
  5. Reset the error using an OBD-II scanner

Related codes

B1898B1899

FAQ

What does the B1897 code mean?

B1897 is an OBD-II diagnostic trouble code that indicates: Horn Switch Circuit Failure

What causes a B1897 error code?

The most common causes of B1897 include: Open horn switch circuit; Short circuit in the circuit; Horn switch malfunction; Wiring harness damage.

How do I fix a B1897 diagnostic trouble code?

To fix B1897: Check the continuity of the horn switch circuit. Check the condition of the contacts and wiring harness. Replace the horn switch if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1897?

Do not drive — repair immediately

How much does it cost to fix B1897?

The estimated repair cost for B1897 is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat