AutoCodes – Generic – B1586

B1586 Code - Dim Panel Decrease Input Circuit Short To Ground

Quick Answer

The Body Control Module (BCM) monitors the Dim Panel Switch. Common causes include Faulty Dim Panel Switch, Dim Panel Switch harness is open or shorted, Dim Panel Switch circuit poor electrical connection. 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: B1586 indicates Dim Panel Decrease Input Circuit Short To Ground.
Common causes: Common causes include Faulty Dim Panel Switch, Dim Panel Switch harness is open or shorted, Dim Panel Switch circuit poor electrical connection.
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.

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Code Popularity 5,702

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 05, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1586 Description

The Body Control Module (BCM) monitors the Dim Panel Switch. The BCM sets the OBDII code when the Dim Panel Switch is not to factory specifications.

OBDII Code B1586 - Dim Panel Decrease Input Circuit Short To Ground - AutoCodes.com — B1586 Code - Dim Panel Decrease Input Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1586?

Faulty Dim Panel Switch
Dim Panel Switch harness is open or shorted
Dim Panel Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1586?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1586 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1586 code?

Need more information on how to fix the B1586 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1586 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1586 Buick — Mirror Horizontal Position Sensor Signal Voltage
B1586 Cadillac — Mirror Horizontal Position Sensor Signal Voltage
B1586 Chevrolet — Mirror Horizontal Position Sensor Signal Voltage
B1586 GMC — Mirror Horizontal Position Sensor Signal Voltage

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 B1586 Code

1. What are the common symptoms of OBDII code B1586?

- Common symptoms include a dim or unresponsive instrument panel, flickering lights on the dashboard, and issues with adjusting brightness settings.

2. What causes the Dim Panel Decrease Input Circuit Short To Ground code B1586?

- The code is typically triggered by a short circuit between the dim panel decrease input circuit and ground within the vehicle's electrical system.

3. How can I diagnose the source of OBDII code B1586?

- To diagnose this code, it is recommended to perform a thorough visual inspection of the wiring harness and connectors associated with the dim panel decrease input circuit, checking for any signs of damage or corrosion.

4. What are some possible repair tips for resolving code B1586?

- Repair tips may include repairing or replacing damaged wiring, connectors, or components related to the dim panel decrease input circuit. It is also advisable to clear the code after making any repairs to see if the issue persists.

5. Can code B1586 be triggered by a faulty dimmer switch?

- Yes, a malfunctioning dimmer switch can also contribute to triggering OBDII code B1586. It is recommended to test the dimmer switch functionality as part of the diagnostic process.

6. Is it safe to continue driving with OBDII code B1586?

- While the vehicle may still be operable with this code present, it is recommended to address the underlying issue promptly to prevent potential electrical problems or safety hazards.

7. Will resetting the trouble code B1586 fix the underlying issue?

- Simply clearing the trouble code without addressing the root cause will not fix the problem. It is essential to diagnose and repair the circuit issue to prevent the code from reoccurring.

8. Can extreme temperatures or moisture contribute to triggering code B1586?

- Yes, extreme temperatures or moisture can potentially exacerbate electrical issues within the vehicle, leading to the triggering of OBDII code B1586 related to the dim panel decrease input circuit.

9. Are there any specific vehicle makes and models more prone to experiencing code B1586?

- While this code can occur in various vehicles, certain makes and models known for electrical system issues may be more prone to experiencing OBDII code B1586 related to the dim panel decrease input circuit.

10. Should I seek professional help to address OBDII code B1586?

- If you are not familiar with automotive electrical systems, it is advisable to seek the assistance of a qualified mechanic or technician to properly diagnose and repair the issue related to code B1586.