OBD Guide
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B1275

Headlight Switch OFF Position Circuit Malfunction

B1275 is an OBD-II diagnostic trouble code meaning: Headlight Switch OFF Position Circuit Malfunction. Common causes: headlight switch malfunction, wiring harness damage. Estimated repair cost: $56–167.

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

Symptoms

  • Headlights do not turn off when switched to 'Off' position
  • Incorrect lighting operation
  • The malfunction light on the instrument panel comes on
  • Headlights can turn on/off by themselves

Causes

  • Headlight switch malfunction
  • Wiring harness damage
  • Oxidation or poor contacts
  • Broken fuse
  • Malfunction of the lighting control unit
  • Short circuit in the circuit

How to Fix

  1. Check fuses associated with the lighting system
  2. Inspect the wiring harness for damage
  3. Check headlight switch contacts
  4. Test the headlight switch with a multimeter
  5. Check the lighting control unit
  6. If necessary, replace the switch or repair the wiring harness

FAQ

What does the B1275 code mean?

B1275 is an OBD-II diagnostic trouble code that indicates: Headlight Switch OFF Position Circuit Malfunction

What causes a B1275 error code?

The most common causes of B1275 include: Headlight switch malfunction; Wiring harness damage; Oxidation or poor contacts; Broken fuse.

How do I fix a B1275 diagnostic trouble code?

To fix B1275: Check fuses associated with the lighting system. Inspect the wiring harness for damage. Check headlight switch contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1275?

Limited driving only, diagnose soon

How much does it cost to fix B1275?

The estimated repair cost for B1275 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat