AutoCodes – Generic – B2591

B2591 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 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 4,943

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC B2591?

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?

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 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 B2591 code?

Need more information on how to fix the B2591 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2591 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2591 Ford — No PSD Detent Switch Detected On Unlatch
B2591 Lincoln — No PSD Detent Switch Detected On Unlatch
B2591 Mercury — No PSD Detent Switch Detected On Unlatch

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 Code

What does the OBDII code B2591 mean?

The OBDII code B2591 indicates that the vehicle's system has detected that the Power Sliding Door (PSD) detent switch is not functioning properly or is not detected during the unlatching process.

What are the common symptoms of the B2591 code?

Common symptoms include a non-functioning power sliding door, warning lights on the dashboard, and issues with door operation such as inability to open or close electronically.

What could cause the B2591 code to trigger?

Causes may include a faulty PSD detent switch, wiring issues, poor electrical connections, or a malfunctioning power sliding door motor.

How can I diagnose the B2591 code?

To diagnose B2591, use an OBDII scanner to confirm the code, inspect the PSD detent switch and wiring for damage or corrosion, and test the switch's continuity and functionality.

What repairs can fix the B2591 code?

Repairs may involve replacing the PSD detent switch, repairing or replacing damaged wiring, or addressing any issues with the door motor or control module.

Is it safe to drive with the B2591 code?

While it may be safe to drive, the power sliding door may not function, which can be a convenience issue, especially for passengers. It's advisable to have it checked and repaired.

Can I clear the B2591 code myself?

Yes, you can clear the code using an OBDII scanner, but if the underlying issue is not resolved, the code may reappear.

How much does it typically cost to repair the issue associated with B2591?

Repair costs can vary widely depending on the specific issue, but expect to pay anywhere from $100 to $500 for parts and labor, depending on the complexity of the repair.

Are there any DIY troubleshooting steps I can take for B2591?

You can start by checking the PSD detent switch for proper operation, inspecting the wiring for visible damage, and ensuring all connectors are secure. If you're comfortable, you could attempt to clean or repair any issues you find.

Will ignoring the B2591 code cause more damage to my vehicle?

While it may not cause immediate damage, ignoring the code can lead to further complications with the power sliding door system and may eventually affect other electrical components in the vehicle.