AutoCodes – Ford – P2839 Ford

P2839 Ford Code - Shift Fork 'B' Position Circuit High

Quick Answer

There are two electric motors used to shift the gears in the transmission, on for gears 1-3-5 and one for gears R-2-4-6. Common causes include Outdated Transmission Control Module (TCM) program (Reprogram TCM), Faulty Transmission Control Module (TCM), Faulty Transmission Assembly. 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: P2839 Ford indicates Shift Fork 'B' Position Circuit High.
Common causes: Common causes include Outdated Transmission Control Module (TCM) program (Reprogram TCM), Faulty Transmission Control Module (TCM), Faulty Transmission Assembly.
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 2,493

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 Feb 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2839 Ford Description

There are two electric motors used to shift the gears in the transmission, on for gears 1-3-5 and one for gears R-2-4-6. The gear shifting is made by two shift drums connected to shift motor pinion via two ideal gears. The maximum shift force is 1500N (337 lb). The motors are integrated in the Transmission Control Module (TCM) and work independently of each other.

OBDII Code P2839 Ford - Shift Fork 'B' Position Circuit High - AutoCodes.com — P2839 Ford Code - Shift Fork 'B' Position Circuit High

What does this mean?

What are the Possible Causes of the DTC P2839 Ford?

Outdated Transmission Control Module (TCM) program (Reprogram TCM)
Faulty Transmission Control Module (TCM)
Faulty Transmission Assembly

How to Fix the DTC P2839 Ford?

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 P2839 Ford 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 P2839 Ford code?

Need more information on how to fix the P2839 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2839 Ford code diagnosed by a professional: Find a repair shop in your area

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 P2839 Ford Code

1. What are the common symptoms of OBDII code P2839 in a Ford vehicle?

- Common symptoms include rough shifting, hesitation during gear changes, and illuminated Check Engine Light.

2. What does the OBDII code P2839 Shift Fork 'B' Position Circuit High mean in a Ford vehicle?

- This code indicates a potential issue with the shift fork 'B' position circuit being higher than the normal range.

3. What are the possible causes of OBDII code P2839 in a Ford vehicle?

- Possible causes include a faulty shift fork position sensor, damaged wiring or connectors, or a problem with the transmission control module.

4. How can I diagnose the OBDII code P2839 Shift Fork 'B' Position Circuit High in my Ford vehicle?

- Diagnosis involves using a scan tool to retrieve the code, checking the shift fork position sensor, inspecting the wiring and connectors, and testing the transmission control module.

5. Can I continue driving my Ford vehicle with OBDII code P2839 present?

- It is not recommended to continue driving with this code present, as it can lead to further transmission issues and potentially cause more damage.

6. How can I repair OBDII code P2839 in my Ford vehicle?

- Repairing this code may involve replacing the shift fork position sensor, repairing or replacing damaged wiring or connectors, or reprogramming the transmission control module.

7. Is it possible to reset the OBDII code P2839 in a Ford vehicle without repairing the underlying issue?

- While you can clear the code using a scan tool, it is important to address the root cause of the problem to prevent it from reoccurring.

8. Are there any preventive maintenance tips to avoid OBDII code P2839 in my Ford vehicle?

- Regularly inspecting and maintaining the transmission system, including the shift fork position sensor and related components, can help prevent this code from appearing.

9. Can a DIY enthusiast with basic automotive knowledge repair OBDII code P2839 in a Ford vehicle?

- Depending on the specific issue, some DIY enthusiasts may be able to address this code themselves by following repair guides and using the necessary tools.

10. How long does it typically take to repair OBDII code P2839 Shift Fork 'B' Position Circuit High in a Ford vehicle?

- The repair time can vary based on the exact cause of the issue, but it may take a few hours to a full day to diagnose and fix the problem effectively.