AutoCodes – GMC – B1586 GMC

B1586 GMC Code - Mirror Horizontal Position Sensor Signal Voltage

Quick Answer

The Left Mirror and the Right Mirror Horizontal Position Sensors are Potentiometers. Common causes include Faulty Left Mirror or Right Mirror, Left Mirror or Right Mirror harness is open or shorted, Left Mirror or Right Mirror 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 GMC indicates Mirror Horizontal Position Sensor Signal Voltage.
Common causes: Common causes include Faulty Left Mirror or Right Mirror, Left Mirror or Right Mirror harness is open or shorted, Left Mirror or Right Mirror 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 731

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 19, 2019

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

The Left Mirror and the Right Mirror Horizontal Position Sensors are Potentiometers. The Driver Door Module (DDM) and the Passenger Door Module (PFDM) determine the horizontal position of the mirrors based on the signal voltage from these sensors. The code will be set when the signal voltage of the mirror horizontal position sensor is above or below the range limits, within 10%, for 30 seconds in the requested position. The voltage range limits depend upon what the actual voltage of the 5 volt reference circuit is, and will vary from vehicle to vehicle and from module to module.

OBDII Code B1586 GMC - Mirror Horizontal Position Sensor Signal Voltage - AutoCodes.com — B1586 GMC Code - Mirror Horizontal Position Sensor Signal Voltage

What does this mean?

What are the Possible Causes of the DTC B1586 GMC?

Faulty Left Mirror or Right Mirror
Left Mirror or Right Mirror harness is open or shorted
Left Mirror or Right Mirror circuit poor electrical connection

How to Fix the DTC B1586 GMC?

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 GMC 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.

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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 B1586 GMC Code

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

- The common symptoms include erratic movement of the side mirrors, inability to adjust the mirror position electronically, and a warning light on the dashboard.

2. What causes OBDII code B1586 GMC to trigger?

- This code is typically triggered when there is a malfunction in the mirror horizontal position sensor or its circuit, leading to incorrect voltage signals being sent to the vehicle's computer.

3. How can I diagnose the issue related to OBDII code B1586 GMC?

- To diagnose the problem, you can use a diagnostic scan tool to read the trouble codes and perform a visual inspection of the mirror position sensor and its wiring for any signs of damage.

4. Can a DIY enthusiast repair OBDII code B1586 GMC?

- While some DIY enthusiasts may attempt to repair this issue by replacing the mirror horizontal position sensor themselves, it is recommended to consult a professional technician for accurate diagnosis and repair.

5. What are the repair options for OBDII code B1586 GMC?

- The repair options include replacing the mirror horizontal position sensor, repairing any damaged wiring or connectors, and resetting the trouble codes using a diagnostic scan tool.

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

- It is generally safe to continue driving with this code, but it is important to address the issue promptly to ensure proper functionality of the side mirrors and other related systems.

7. How much does it cost to repair OBDII code B1586 GMC at a dealership?

- The cost of repairing this code at a dealership can vary depending on the specific diagnosis and parts needed, but it may range from $100 to $300 or more.

8. Are there any preventive measures to avoid OBDII code B1586 GMC in the future?

- To prevent this code from recurring, you can periodically inspect the mirror position sensor and its wiring for any signs of wear or damage, and address any issues promptly.

9. Can extreme weather conditions affect the mirror horizontal position sensor and trigger OBDII code B1586 GMC?

- Yes, extreme weather conditions such as excessive heat or cold can potentially affect the sensor's performance and lead to the triggering of this OBDII code.

10. Will resetting the trouble codes fix OBDII code B1586 GMC permanently?

- Resetting the trouble codes may temporarily clear the code, but if the underlying issue with the mirror horizontal position sensor is not addressed, the code is likely to reappear.