AutoCodes – Lincoln – B2591 Lincoln

B2591 Lincoln 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 Lincoln 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 462

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

What does this mean?

What are the Possible Causes of the DTC B2591 Lincoln?

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 Lincoln?

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 Lincoln 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 Lincoln Code

1. What does the OBDII code B2591 mean on a Lincoln?

The B2591 code indicates that the Power Sliding Door (PSD) system has not detected the detent switch signal when the door is being unlatched.

2. What are common symptoms of the B2591 code on a Lincoln?

Symptoms include the power sliding door not opening or closing correctly, the door being unresponsive to commands, or error messages related to the sliding door system on the dashboard.

3. What causes the B2591 code to appear on a Lincoln?

The code is often caused by a faulty detent switch, damaged wiring or connectors in the PSD system, a malfunctioning door motor, or issues with the PSD control module.

4. Can the B2591 code on a Lincoln be caused by a blown fuse?

Yes, a blown fuse in the power sliding door circuit can disrupt the system and potentially trigger the B2591 code.

5. How can I diagnose the B2591 code on a Lincoln?

Start by inspecting the detent switch and its wiring for damage or disconnection, check the PSD fuse, and use a scan tool to monitor data from the sliding door system.

6. How is the B2591 code typically fixed on a Lincoln?

Repairs may involve replacing the detent switch, repairing damaged wiring or connectors, resetting the PSD system, or reprogramming the control module.

7. Can I drive my Lincoln with the B2591 code active?

Yes, but the power sliding door may not function properly, which could pose a safety or convenience issue, especially if the door fails to latch securely.

8. How much does it cost to fix the B2591 code on a Lincoln?

Costs vary depending on the exact issue, but replacing a detent switch can range from $100 to $300, including parts and labor.

9. Can I fix the B2591 code on my Lincoln myself?

If you have experience working with electrical systems, you can inspect and replace the detent switch or repair wiring. However, more complex issues may require a professional.

10. Will clearing the B2591 code solve the problem permanently?

Clearing the code may temporarily reset the system, but the underlying issue must be fixed to prevent the code from returning.