OBD Guide
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B1592

Autolamp Delay Decrease Circuit Open

B1592 is an OBD-II diagnostic trouble code meaning: Autolamp Delay Decrease Circuit Open. Common causes: broken or damaged wiring harness, headlight delay relay malfunction. Estimated repair cost: $22–89.

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

Symptoms

  • Headlights do not turn on automatically
  • No headlight delay
  • Incorrect operation of the automatic lighting system

Causes

  • Broken or damaged wiring harness
  • Headlight delay relay malfunction
  • Problems in the lighting control module
  • Corrosion or poor contact in connectors

How to Fix

  1. Check the wiring harness for breaks or damage
  2. Check the headlight delay relay
  3. Diagnose the lighting control module
  4. Clean or replace connectors if necessary

Related codes

B1590B1591B1593

FAQ

What does the B1592 code mean?

B1592 is an OBD-II diagnostic trouble code that indicates: Autolamp Delay Decrease Circuit Open

What causes a B1592 error code?

The most common causes of B1592 include: Broken or damaged wiring harness; Headlight delay relay malfunction; Problems in the lighting control module; Corrosion or poor contact in connectors.

How do I fix a B1592 diagnostic trouble code?

To fix B1592: Check the wiring harness for breaks or damage. Check the headlight delay relay. Diagnose the lighting control module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1592?

Limited driving only, diagnose soon

How much does it cost to fix B1592?

The estimated repair cost for B1592 is $22–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat