OBD Guide
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B2489

Underhood Lamp Output Circuit Failure

B2489 is an OBD-II diagnostic trouble code meaning: Underhood Lamp Output Circuit Failure. Common causes: burnt out lamp, open or short circuit in the circuit. Estimated repair cost: $6–33.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$6–33 (est.)

Symptoms

  • Engine compartment lamp does not turn on
  • The engine compartment lamp does not turn on correctly
  • Check Engine light comes on

Causes

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

How to Fix

  1. Check the lamp condition
  2. Check the integrity of the circuit and connection
  3. Check lamp relay
  4. Check the control unit for errors

FAQ

What does the B2489 code mean?

B2489 is an OBD-II diagnostic trouble code that indicates: Underhood Lamp Output Circuit Failure

What causes a B2489 error code?

The most common causes of B2489 include: Burnt out lamp; Open or short circuit in the circuit; Faulty relay; Problems with the control unit.

How do I fix a B2489 diagnostic trouble code?

To fix B2489: Check the lamp condition. Check the integrity of the circuit and connection. Check lamp relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2489?

Yes, but get it checked soon

How much does it cost to fix B2489?

The estimated repair cost for B2489 is $6–33. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat