OBD Guide
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B2A30

Left Front Lamp Low Beam Circuit Open

B2A30 is an OBD-II diagnostic trouble code meaning: Left Front Lamp Low Beam Circuit Open. Common causes: broken wire, oxidation of contacts. Estimated repair cost: $6–56.

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

Symptoms

  • The low beam of the left headlight does not work
  • Dashboard warning
  • Circuit protection tripped

Causes

  • Broken wire
  • Oxidation of contacts
  • Burnt out lamp
  • Faulty relay
  • Fuse problems
  • BCM malfunction

How to Fix

  1. Check the condition of the lamp and socket
  2. Inspect the wiring harness for damage
  3. Check the headlight circuit fuse and relay
  4. Ring the chain from the BCM to the headlight
  5. Clean connector contacts
  6. If necessary, replace faulty components

Related codes

B2A31B2A32B2A33

FAQ

What does the B2A30 code mean?

B2A30 is an OBD-II diagnostic trouble code that indicates: Left Front Lamp Low Beam Circuit Open

What causes a B2A30 error code?

The most common causes of B2A30 include: Broken wire; Oxidation of contacts; Burnt out lamp; Faulty relay.

How do I fix a B2A30 diagnostic trouble code?

To fix B2A30: Check the condition of the lamp and socket. Inspect the wiring harness for damage. Check the headlight circuit fuse and relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2A30?

Limited driving only, diagnose soon

How much does it cost to fix B2A30?

The estimated repair cost for B2A30 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat