OBD Guide
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B1590

Autolamp Delay Increase Circuit Short To Ground

B1590 is an OBD-II diagnostic trouble code meaning: Autolamp Delay Increase Circuit Short To Ground. Common causes: wiring harness damage, light control switch malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Incorrect operation of automatic headlights
  • Headlights do not turn on after a delay
  • Fault indication on the dashboard

Causes

  • Wiring harness damage
  • Light control switch malfunction
  • Short circuit to ground in the circuit
  • Problems in the lighting control module

How to Fix

  1. Check the wiring harness for damage
  2. Diagnosis of the lighting control switch
  3. Checking the circuit for short circuit
  4. Replacing damaged components
  5. Resetting the error and checking the system operation

Related codes

B1591B1592B1593

FAQ

What does the B1590 code mean?

B1590 is an OBD-II diagnostic trouble code that indicates: Autolamp Delay Increase Circuit Short To Ground

What causes a B1590 error code?

The most common causes of B1590 include: Wiring harness damage; Light control switch malfunction; Short circuit to ground in the circuit; Problems in the lighting control module.

How do I fix a B1590 diagnostic trouble code?

To fix B1590: Check the wiring harness for damage. Diagnosis of the lighting control switch. Checking the circuit for short circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1590?

Yes, but get it checked soon

How much does it cost to fix B1590?

The estimated repair cost for B1590 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat