AutoCodes – Nissan – P2838 Nissan

P2838 Nissan Code - Shift Fork 'B' Position Circuit Low

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 Common causes include Outdated Transmission Control Module (TCM) program (Reprogram TCM), Faulty Transmission Control Module (TCM), Faulty Transmission Assembly.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: P2838 Nissan indicates Shift Fork 'B' Position Circuit Low.
Common causes: Common causes include Outdated Transmission Control Module (TCM) program (Reprogram TCM), Faulty Transmission Control Module (TCM), Faulty Transmission Assembly.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 1,436

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 P2838 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 P2838 Nissan - Shift Fork 'B' Position Circuit Low - AutoCodes.com — P2838 Nissan Code - Shift Fork 'B' Position Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2838 Nissan?

Outdated Transmission Control Module (TCM) program (Reprogram TCM)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

How to Fix the DTC P2838 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 P2838 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 P2838 Nissan code?

Need more information on how to fix the P2838 Nissan code? Get Access to Factory Service Manuals

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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 P2838 Nissan Code

1. What are the common symptoms of OBDII code P2838 in a Nissan vehicle?

- Common symptoms include difficulty shifting gears, harsh shifting, transmission slipping, and illuminated warning lights on the dashboard.

2. What does the OBDII code P2838 Shift Fork 'B' Position Circuit Low mean in a Nissan?

- This code indicates a problem with the shift fork 'B' position circuit, specifically that the voltage level is lower than the expected range.

3. What are the possible causes of OBDII code P2838 in a Nissan?

- Possible causes include a faulty shift fork position sensor, damaged wiring or connectors in the circuit, low transmission fluid levels, or a malfunctioning transmission control module.

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

- Diagnosing this problem typically involves using a scan tool to retrieve the OBDII code, inspecting the shift fork position sensor and its wiring, checking transmission fluid levels, and conducting a thorough visual inspection of related components.

5. Can I continue driving my Nissan with OBDII code P2838 present?

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

6. What are the repair options for fixing OBDII code P2838 in a Nissan?

- Repair options may include replacing the shift fork position sensor, repairing damaged wiring or connectors, topping up transmission fluid, or reprogramming the transmission control module.

7. How much does it typically cost to repair OBDII code P2838 in a Nissan?

- The cost of repairing this code can vary depending on the specific cause of the issue, but it may range from $200 to $500 or more, including parts and labor.

8. Can I reset the OBDII code P2838 in my Nissan without making any repairs?

- While you can clear the code using a scan tool, it is crucial to address the underlying issue causing the code to prevent further transmission problems.

9. Is OBDII code P2838 a common issue in Nissan vehicles?

- While not extremely common, this code can occur in Nissan vehicles, particularly in models with automatic transmissions or electronic shift controls.

10. How can I prevent OBDII code P2838 from occurring in my Nissan in the future?

- To prevent this code, it is essential to maintain regular transmission fluid checks and changes, address any warning signs of transmission issues promptly, and follow the manufacturer's recommended maintenance schedule for your vehicle.