OBD Guide
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B1754

Hazard Flash Output Circuit Open

B1754 is an OBD-II diagnostic trouble code meaning: Hazard Flash Output Circuit Open. Common causes: broken or damaged wiring harness, faulty alarm relay. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Alarms don't work
  • The hazard warning light on the dashboard does not light up
  • Turn signals may not work

Causes

  • Broken or damaged wiring harness
  • Faulty alarm relay
  • Problems with the body control module
  • Oxidation of contacts in connectors
  • Malfunction of the hazard warning button

How to Fix

  1. Check the hazard warning circuit fuse
  2. Inspect the wiring harness for damage
  3. Check the operation of the alarm relay
  4. Test the hazard warning button
  5. Check the contacts in the circuit connectors
  6. If necessary, replace faulty components

Related codes

B1755B1753

FAQ

What does the B1754 code mean?

B1754 is an OBD-II diagnostic trouble code that indicates: Hazard Flash Output Circuit Open

What causes a B1754 error code?

The most common causes of B1754 include: Broken or damaged wiring harness; Faulty alarm relay; Problems with the body control module; Oxidation of contacts in connectors.

How do I fix a B1754 diagnostic trouble code?

To fix B1754: Check the hazard warning circuit fuse. Inspect the wiring harness for damage. Check the operation of the alarm relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1754?

Limited driving only, diagnose soon

How much does it cost to fix B1754?

The estimated repair cost for B1754 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat