OBD Guide

B1D35

Hazard Switch

B1D35 is an OBD-II diagnostic trouble code meaning: Hazard Switch. Common causes: hazard switch malfunction, open or short circuit in wiring harness. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect operation of the alarm system
  • Hazard alarm does not turn on
  • Hazard warning lights flashing intermittently

Causes

  • Hazard switch malfunction
  • Open or short circuit in wiring harness
  • Problems with the control unit
  • Oxidation of contacts
  • Poor connection in the circuit

How to Fix

  1. Check the condition of the hazard warning switch
  2. Inspect the wiring harness for damage
  3. Check contacts for oxidation and quality of connections
  4. Test the control unit for errors
  5. Replace faulty components if necessary

Related codes

FAQ

What does the B1D35 code mean?

B1D35 is an OBD-II diagnostic trouble code that indicates: Hazard Switch

What causes a B1D35 error code?

The most common causes of B1D35 include: Hazard switch malfunction; Open or short circuit in wiring harness; Problems with the control unit; Oxidation of contacts.

How do I fix a B1D35 diagnostic trouble code?

To fix B1D35: Check the condition of the hazard warning switch. Inspect the wiring harness for damage. Check contacts for oxidation and quality of connections. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1D35?

Limited driving only, diagnose soon

How much does it cost to fix B1D35?

The estimated repair cost for B1D35 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat