OBD Guide
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B2490

Underhood Lamp Output Circuit Short To Battery

B2490 is an OBD-II diagnostic trouble code meaning: Underhood Lamp Output Circuit Short To Battery. Common causes: wiring harness damage, faulty lamp under the hood. Estimated repair cost: $22–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–111 (est.)

Symptoms

  • The light under the hood won't turn off
  • Low battery
  • The malfunction indicator on the dashboard lights up

Causes

  • Wiring harness damage
  • Faulty lamp under the hood
  • Short circuit in relay
  • Body Control Module (BCM) Problems

How to Fix

  1. Check the condition of the lamp under the hood
  2. Inspect the wiring harness for damage
  3. Check relays and fuses
  4. Diagnose the body control module (BCM)

Related codes

B2485B2495

FAQ

What does the B2490 code mean?

B2490 is an OBD-II diagnostic trouble code that indicates: Underhood Lamp Output Circuit Short To Battery

What causes a B2490 error code?

The most common causes of B2490 include: Wiring harness damage; Faulty lamp under the hood; Short circuit in relay; Body Control Module (BCM) Problems.

How do I fix a B2490 diagnostic trouble code?

To fix B2490: Check the condition of the lamp under the hood. Inspect the wiring harness for damage. Check relays and fuses. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2490?

Limited driving only, diagnose soon

How much does it cost to fix B2490?

The estimated repair cost for B2490 is $22–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat