OBD Guide
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B1587

Autolamp Delay Increase Circuit Failure

B1587 is an OBD-II diagnostic trouble code meaning: Autolamp Delay Increase Circuit Failure. Common causes: damage to the control circuit wiring harness, faulty headlight switch. Estimated repair cost: $22–89.

Severity
✅ Low
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–89 (est.)

Symptoms

  • No delay in turning on headlights after turning off the ignition
  • Incorrect operation of automatic headlights
  • Unstable operation of the lighting system

Causes

  • Damage to the control circuit wiring harness
  • Faulty headlight switch
  • Problem with the lighting control unit
  • Corrosion or poor contact in connectors

How to Fix

  1. Check the condition of the wiring harness for damage
  2. Check the headlight switch for correct operation
  3. Diagnose the lighting control unit
  4. Clean the connector contacts and check their integrity

Related codes

B1586B1588

FAQ

What does the B1587 code mean?

B1587 is an OBD-II diagnostic trouble code that indicates: Autolamp Delay Increase Circuit Failure

What causes a B1587 error code?

The most common causes of B1587 include: Damage to the control circuit wiring harness; Faulty headlight switch; Problem with the lighting control unit; Corrosion or poor contact in connectors.

How do I fix a B1587 diagnostic trouble code?

To fix B1587: Check the condition of the wiring harness for damage. Check the headlight switch for correct operation. Diagnose the lighting control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1587?

Limited driving only, diagnose soon

How much does it cost to fix B1587?

The estimated repair cost for B1587 is $22–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat