AutoCodes – Mercury – B2591 Mercury

B2591 Mercury Code - No PSD Detent Switch Detected On Unlatch

Quick Answer

During an open operation, the Power Sliding Door (PSD) Module grounds the unlatch actuator to unlatch the sliding door. Common causes include Faulty Power Sliding Door Detent Switch, Power Sliding Door Detent Switch harness is open or shorted, Power Sliding Door Detent 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: B2591 Mercury indicates No PSD Detent Switch Detected On Unlatch.
Common causes: Common causes include Faulty Power Sliding Door Detent Switch, Power Sliding Door Detent Switch harness is open or shorted, Power Sliding Door Detent 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 604

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 Jan 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2591 Mercury Description

During an open operation, the Power Sliding Door (PSD) Module grounds the unlatch actuator to unlatch the sliding door. The circuit is shared by the unlatch actuator and the detent switch as a ground return to the PSD module. If the PSD module detects a detent signal change on the circuit, the PSD module powers the clutch and motor to open the sliding door. If the PSD module does not detect the detent switch to ground during self test, DTC B2591 sets.

OBDII Code B2591 Mercury - No PSD Detent Switch Detected On Unlatch - AutoCodes.com — B2591 Mercury Code - No PSD Detent Switch Detected On Unlatch

What does this mean?

What are the Possible Causes of the DTC B2591 Mercury?

Faulty Power Sliding Door Detent Switch
Power Sliding Door Detent Switch harness is open or shorted
Power Sliding Door Detent Switch circuit poor electrical connection
Faulty Power Sliding Door (PSD) Module

How to Fix the DTC B2591 Mercury?

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 B2591 Mercury 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 B2591 Mercury Code

1. What are the common symptoms of OBDII code B2591 in a Mercury vehicle?

- Common symptoms include issues with the Power Sliding Door (PSD) not latching or unlatching properly, warning lights on the dashboard, and the PSD not functioning as expected.

2. What does the OBDII code B2591 "No PSD Detent Switch Detected On Unlatch" mean for a Mercury vehicle?

- This code indicates that the Power Sliding Door's detent switch is not being detected when the door is unlatched, potentially leading to operational issues with the door.

3. What are the possible causes of OBDII code B2591 in a Mercury?

- Causes may include a faulty detent switch, wiring issues, a malfunctioning control module, or mechanical problems with the Power Sliding Door system.

4. How can I diagnose the root cause of OBDII code B2591 in my Mercury vehicle?

- Diagnosing this code typically involves checking the detent switch, inspecting wiring for damage, testing the control module, and ensuring the mechanical components of the Power Sliding Door are functioning correctly.

5. Can I still drive my Mercury safely with OBDII code B2591 present?

- It is not recommended to drive with this code present, as it may affect the proper operation of the Power Sliding Door, potentially leading to safety hazards or further damage.

6. How can I repair OBDII code B2591 in my Mercury?

- Repair options may include replacing the detent switch, repairing any damaged wiring, resetting the control module, or addressing mechanical issues with the Power Sliding Door system.

7. Will resetting the OBDII code B2591 in my Mercury make the problem go away?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the detent switch detection problem.

8. Is it possible to fix OBDII code B2591 in a Mercury on my own, or do I need professional help?

- Depending on your level of automotive repair expertise, you may be able to address this code on your own by following diagnostic procedures and making necessary repairs. However, professional help may be needed for complex issues.

9. How much does it typically cost to repair OBDII code B2591 in a Mercury at a mechanic or dealership?

- Repair costs can vary based on the specific cause of the code and the labor rates of the service provider. It is recommended to obtain estimates from different sources before proceeding with repairs.

10. Are there any preventive maintenance tips to avoid OBDII code B2591 in a Mercury in the future?

- Regularly inspecting and maintaining the Power Sliding Door system, checking for any signs of wear or damage, and addressing issues promptly can help prevent the occurrence of code B2591 in the future.