OBD Guide
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B2A39

Puddle Lamp Output Circuit Open

B2A39 is an OBD-II diagnostic trouble code meaning: Puddle Lamp Output Circuit Open. Common causes: broken wires in the lamp circuit, backlight burnt out. Estimated repair cost: $6–33.

Severity
✅ Low
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–33 (est.)

Symptoms

  • The light under the door does not work
  • Error message on the dashboard
  • The backlight does not turn on when the door is opened

Causes

  • Broken wires in the lamp circuit
  • Backlight burnt out
  • Problems with the backlight control module
  • Corrosion of contacts or connectors
  • Wiring harness damage

How to Fix

  1. Check the integrity of the backlight lamp
  2. Inspect wires and connectors for damage and corrosion
  3. Check the voltage at the lamp connector
  4. Replace faulty lamp or wires
  5. Test the operation of the system after repair

FAQ

What does the B2A39 code mean?

B2A39 is an OBD-II diagnostic trouble code that indicates: Puddle Lamp Output Circuit Open

What causes a B2A39 error code?

The most common causes of B2A39 include: Broken wires in the lamp circuit; Backlight burnt out; Problems with the backlight control module; Corrosion of contacts or connectors.

How do I fix a B2A39 diagnostic trouble code?

To fix B2A39: Check the integrity of the backlight lamp. Inspect wires and connectors for damage and corrosion. Check the voltage at the lamp connector. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2A39?

Limited driving only, diagnose soon

How much does it cost to fix B2A39?

The estimated repair cost for B2A39 is $6–33. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat