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Engine-Codes – Generic – B1587

B1587 Code - Autolamp Delay Increase Circuit Failure

Quick Answer

The B1587 diagnostic trouble code refers to an Autolamp Delay Increase Circuit Failure. Common causes include Malfunctioning relay controlling the Autolamp Delay Increase Circuit, Faulty sensor detecting the engine's status, Wiring issues such as shorts or open circuits. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B1587 indicates Autolamp Delay Increase Circuit Failure.
Common causes
Common causes include Malfunctioning relay controlling the Autolamp Delay Increase Circuit, Faulty sensor detecting the engine's status, Wiring issues such as shorts or open circuits.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code B1587 Description

The B1587 diagnostic trouble code refers to an Autolamp Delay Increase Circuit Failure. This code is typically found in vehicles equipped with automatic lighting systems that allow the headlights to remain on for a short period of time after the engine is turned off. The Autolamp Delay Increase Circuit is responsible for controlling the duration of this delay.

OBDII Code B1587 - Autolamp Delay Increase Circuit Failure
B1587 Code - Autolamp Delay Increase Circuit Failure

Common Causes of B1587

  1. Malfunctioning relay controlling the Autolamp Delay Increase Circuit
  2. Faulty sensor detecting the engine's status
  3. Wiring issues such as shorts or open circuits
  4. Defective control module responsible for the automatic lighting system
  5. Corrosion or damage to the electrical connections related to the Autolamp Delay Increase Circuit

Symptoms of B1587

  1. Headlights remaining on for an extended period after the engine is turned off
  2. Headlights turning off too quickly or too slowly after the engine is turned off
  3. Inconsistent behavior of the automatic lighting system
  4. Battery draining more quickly than usual
  5. Warning light on the dashboard related to the lighting system

How to Fix B1587

  1. Diagnose the issue by using a diagnostic scanner to retrieve the fault codes and inspecting the Autolamp Delay Increase Circuit components.
  2. Check the relay, sensor, wiring, and control module for any signs of damage or malfunction.
  3. Repair or replace any faulty components identified during the diagnostic process.
  4. Clear the fault codes from the vehicle's computer system and test the automatic lighting system to ensure proper functionality.
  5. Verify that the headlights turn off after the designated delay time and that there are no warning lights on the dashboard related to the lighting system.

Cost to Fix B1587

The cost of repairing an Autolamp Delay Increase Circuit Failure can vary depending on the specific cause of the issue and the extent of the repairs needed. As a rough estimate, the repair costs for this issue could range from $100 to $500, including parts and labor. It's important to note that labor rates at auto repair shops can vary widely, so it's advisable to obtain quotes from multiple shops to get a more accurate estimate. Additionally, the cost of any replacement parts required for the repair will also impact the total cost.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1587 Code

1. What are the common symptoms of OBDII code B1587, Autolamp Delay Increase Circuit Failure?

- Common symptoms include the automatic lights not functioning properly, delays in the autolamp system, or complete failure of the autolamp system.

2. What are the possible causes of OBDII code B1587, Autolamp Delay Increase Circuit Failure?

- Possible causes may include a faulty autolamp delay switch, damaged wiring or connectors in the circuit, or a malfunctioning autolamp control module.

3. How can I diagnose OBDII code B1587, Autolamp Delay Increase Circuit Failure?

- Diagnosis typically involves inspecting the autolamp delay switch, checking the wiring and connectors for damage, and testing the autolamp control module for proper functioning.

4. Are there any simple repair tips for fixing OBDII code B1587, Autolamp Delay Increase Circuit Failure?

- Simple repair tips may include checking and replacing any blown fuses related to the autolamp system, ensuring all connections are secure, and resetting the autolamp system.

5. Can OBDII code B1587, Autolamp Delay Increase Circuit Failure cause any other issues in the vehicle?

- While the main issue is related to the autolamp system, unresolved B1587 code can potentially drain the vehicle's battery if the autolamp system remains active when the vehicle is turned off.

6. Is it safe to continue driving with OBDII code B1587, Autolamp Delay Increase Circuit Failure?

- It is generally safe to continue driving with this code, but it is recommended to address the issue promptly to avoid potential safety concerns related to the autolamp system not functioning correctly.

7. Can a DIY enthusiast fix OBDII code B1587, Autolamp Delay Increase Circuit Failure?

- Depending on the specific cause of the issue, DIY enthusiasts with automotive repair experience may be able to fix the problem by following repair guides or consulting with professionals.

8. How much does it typically cost to repair OBDII code B1587, Autolamp Delay Increase Circuit Failure at a mechanic's shop?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor at a mechanic's shop.

9. Will resetting the OBDII system clear OBDII code B1587, Autolamp Delay Increase Circuit Failure?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the code is not fixed, the code is likely to reappear after some time.

10. How long does it typically take to repair OBDII code B1587, Autolamp Delay Increase Circuit Failure?

- The repair time can vary based on the cause of the issue and the availability of parts, but it may take anywhere from 1 to 3 hours for a mechanic to diagnose and fix the problem.

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