OBD Guide
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B2A22

Headlamp Off Circuit Open

B2A22 is an OBD-II diagnostic trouble code meaning: Headlamp Off Circuit Open. Common causes: broken or damaged wiring harness, faulty headlight control relay. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Headlights do not turn off automatically
  • Headlights do not respond to control commands
  • Burning fault lamp on the dashboard

Causes

  • Broken or damaged wiring harness
  • Faulty headlight control relay
  • Blown fuse
  • Problems with the control unit
  • Contact corrosion

How to Fix

  1. Check the fuses associated with the headlights
  2. Inspect the wiring harness for damage
  3. Check headlight control relay
  4. Diagnose the control unit if necessary
  5. Clean and check contacts

Related codes

B2A21B2A23B2A24

FAQ

What does the B2A22 code mean?

B2A22 is an OBD-II diagnostic trouble code that indicates: Headlamp Off Circuit Open

What causes a B2A22 error code?

The most common causes of B2A22 include: Broken or damaged wiring harness; Faulty headlight control relay; Blown fuse; Problems with the control unit.

How do I fix a B2A22 diagnostic trouble code?

To fix B2A22: Check the fuses associated with the headlights. Inspect the wiring harness for damage. Check headlight control relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2A22?

Limited driving only, diagnose soon

How much does it cost to fix B2A22?

The estimated repair cost for B2A22 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat