OBD Guide
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B2501

Left Lamp Low Beam Circuit Failure

B2501 is an OBD-II diagnostic trouble code meaning: Left Lamp Low Beam Circuit Failure. Common causes: burnt out lamp, open or short circuit in wiring harness. Estimated repair cost: $6–56.

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

Symptoms

  • Left low beam headlight does not work
  • Left low beam headlight flashing
  • Dashboard warning

Causes

  • Burnt out lamp
  • Open or short circuit in wiring harness
  • Faulty relay
  • Blown fuse
  • Problems with the control unit

How to Fix

  1. Check the left low beam headlight bulb
  2. Check fuse and relay
  3. Inspect the wiring harness for damage
  4. Check the voltage at the headlight connector
  5. If necessary, replace faulty components

Related codes

B2502B2503B2504

FAQ

What does the B2501 code mean?

B2501 is an OBD-II diagnostic trouble code that indicates: Left Lamp Low Beam Circuit Failure

What causes a B2501 error code?

The most common causes of B2501 include: Burnt out lamp; Open or short circuit in wiring harness; Faulty relay; Blown fuse.

How do I fix a B2501 diagnostic trouble code?

To fix B2501: Check the left low beam headlight bulb. Check fuse and relay. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2501?

Limited driving only, diagnose soon

How much does it cost to fix B2501?

The estimated repair cost for B2501 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat