AutoCodes – Generic – P2846

P2846 Code - Shift Fork 'B' Position Sensor Incorrect Neutral Position Indicated

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 Common causes include Outdated Transmission Control Module (TCM) program (Reprogram TCM), Faulty Transmission Control Module (TCM), Faulty Transmission Assembly.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: P2846 indicates Shift Fork 'B' Position Sensor Incorrect Neutral Position Indicated.
Common causes: Common causes include Outdated Transmission Control Module (TCM) program (Reprogram TCM), Faulty Transmission Control Module (TCM), Faulty Transmission Assembly.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 8,303

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 P2846 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 P2846 - Shift Fork 'B' Position Sensor Incorrect Neutral Position Indicated - AutoCodes.com — P2846 Code - Shift Fork 'B' Position Sensor Incorrect Neutral Position Indicated

What does this mean?

What are the Possible Causes of the DTC P2846?

Outdated Transmission Control Module (TCM) program (Reprogram TCM)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

How to Fix the DTC P2846?

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 P2846 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 P2846 code?

Need more information on how to fix the P2846 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2846 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P2846 Ford — Shift Fork 'B' Position Sensor Incorrect Neutral Position Indicated
P2846 Nissan — Shift Fork 'B' Position Sensor Incorrect Neutral Position Indicated

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 P2846 Code

1. What are the common symptoms of OBDII code P2846?

The common symptoms of code P2846 include difficulty shifting gears, transmission slippage, and the Check Engine Light illuminating on the dashboard.

2. What causes OBDII code P2846 to occur?

Code P2846 is typically triggered when the Shift Fork 'B' Position Sensor detects an incorrect neutral position, signaling a problem with the sensor itself, wiring issues, or a faulty transmission control module.

3. How serious is OBDII code P2846?

Code P2846 can lead to shifting problems and potential transmission issues if left unresolved. It is recommended to address this code promptly to prevent further damage to the transmission.

4. What should I do if I encounter OBDII code P2846?

If you encounter code P2846, it is advisable to have your vehicle diagnosed by a professional mechanic to determine the exact cause of the issue and proceed with the necessary repairs.

5. Can I continue driving with OBDII code P2846 present?

While it may be possible to drive with code P2846 present, it is not recommended as it can lead to further damage to the transmission. It is best to address the issue as soon as possible.

6. How can I repair OBDII code P2846?

Repairing code P2846 may involve replacing the Shift Fork 'B' Position Sensor, repairing any damaged wiring, or reprogramming the transmission control module. A qualified mechanic should perform these repairs.

7. Are there any DIY tips for troubleshooting OBDII code P2846?

DIY troubleshooting for code P2846 is not recommended due to the complexity of transmission systems. It is best to seek professional help to diagnose and repair the issue accurately.

8. How much does it cost to fix OBDII code P2846?

The cost of fixing code P2846 can vary depending on the root cause of the issue, parts needed for replacement, and labor costs. It is advisable to obtain quotes from different mechanics for an accurate estimate.

9. Can a faulty Shift Fork 'B' Position Sensor cause other transmission problems?

Yes, a faulty Shift Fork 'B' Position Sensor can cause other transmission problems such as incorrect gear shifting, transmission slippage, and potential damage to the transmission if not addressed promptly.

10. How can I prevent OBDII code P2846 from occurring in the future?

To prevent code P2846 from occurring in the future, it is essential to maintain regular transmission servicing, address any transmission issues promptly, and ensure the Shift Fork 'B' Position Sensor is functioning correctly during routine maintenance checks.