AutoCodes – Nissan – P2839 Nissan

P2839 Nissan 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 Common causes include Outdated Transmission Control Module (TCM) program (Reprogram TCM), Faulty Transmission Control Module (TCM), Faulty Transmission Assembly.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 Nissan 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Common causes: Common causes include Outdated Transmission Control Module (TCM) program (Reprogram TCM), Faulty Transmission Control Module (TCM), Faulty Transmission Assembly.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.

Save to My Repairs My Repairs

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

Code Popularity 1,672

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
Add Comment

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

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

What does this mean?

What are the Possible Causes of the DTC P2839 Nissan?

Outdated Transmission Control Module (TCM) program (Reprogram TCM)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

How to Fix the DTC P2839 Nissan?

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 Nissan 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 Nissan code?

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

Need Help with the Code?

Get the P2839 Nissan 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 Nissan Code

1. What are the common symptoms of OBDII code P2839 Shift Fork 'B' Position Circuit High in a Nissan vehicle?

- Common symptoms include difficulty shifting gears, rough shifting, and the transmission not engaging properly.

2. What are the possible causes of OBDII code P2839 in a Nissan?

- The code P2839 can be caused by a faulty shift fork 'B' position sensor, damaged wiring or connectors in the circuit, or issues with the transmission control module.

3. How can I diagnose the Shift Fork 'B' Position Circuit High issue in my Nissan?

- Diagnosing the issue involves using a scan tool to read the OBDII code, checking the shift fork 'B' position sensor for proper operation, and inspecting the wiring and connectors for any damage.

4. Can I drive my Nissan with OBDII code P2839 Shift Fork 'B' Position Circuit High?

- It is not recommended to drive your Nissan with this code as it can lead to further transmission problems and potential safety issues. It is best to address the issue promptly.

5. How can I repair OBDII code P2839 Shift Fork 'B' Position Circuit High in my Nissan?

- Repairing the issue may involve replacing the shift fork 'B' position sensor, repairing any damaged wiring or connectors, or reprogramming the transmission control module.

6. Is it possible to reset the OBDII code P2839 in a Nissan without fixing the underlying issue?

- While you can clear the code with a scan tool, it is important to address the root cause of the problem to prevent it from recurring and potentially causing further damage.

7. How much does it typically cost to repair OBDII code P2839 in a Nissan?

- The cost of repair can vary depending on the specific issue causing the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can a DIY enthusiast fix OBDII code P2839 Shift Fork 'B' Position Circuit High in a Nissan?

- Depending on your skill level and access to tools, it may be possible to address the issue yourself by following repair guides or tutorials. However, complex transmission issues are best handled by professional mechanics.

9. Will OBDII code P2839 cause my Nissan to go into limp mode?

- In some cases, the Shift Fork 'B' Position Circuit High issue can trigger the transmission to go into limp mode to prevent further damage. It is important to address the problem promptly to avoid this situation.

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

- The repair time can vary depending on the exact cause of the issue and the complexity of the repair. It could take anywhere from a few hours to a full day for the repair to be completed.