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Engine-Codes – Generic – P0955

P0955 Code - Auto Shift Manual Mode Circuit

Quick Answer

The P0955 diagnostic trouble code (DTC) pertains to the Auto Shift Manual Mode Circuit. Common causes include Faulty manual mode switch, Wiring issues or shorts in the circuit, Malfunctioning control module. 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
P0955 indicates Auto Shift Manual Mode Circuit.
Common causes
Common causes include Faulty manual mode switch, Wiring issues or shorts in the circuit, Malfunctioning control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P0955 Description

The P0955 diagnostic trouble code (DTC) pertains to the Auto Shift Manual Mode Circuit. This code indicates an issue with the automatic transmission's ability to shift into manual mode properly. In vehicles equipped with manual mode, this feature allows the driver to manually control gear shifts, providing a more engaging driving experience. When this circuit malfunctions, it can lead to various issues with the transmission's operation and overall performance of the vehicle.

OBDII Code P0955 - Auto Shift Manual Mode Circuit
P0955 Code - Auto Shift Manual Mode Circuit

Common Causes of P0955

  1. Faulty manual mode switch
  2. Wiring issues or shorts in the circuit
  3. Malfunctioning control module
  4. Loose or corroded connectors
  5. Electrical system issues

Symptoms of P0955

  1. Difficulty shifting into manual mode
  2. Delayed or erratic shifting
  3. Illumination of the check engine light
  4. Reduced fuel efficiency
  5. Transmission slipping or jerking

How to Fix P0955

  1. Begin by connecting a diagnostic scanner to the vehicle's OBD-II port to retrieve the specific details of the P0955 code.
  2. Inspect the manual mode switch and wiring for any visible damage or corrosion. Replace any damaged components as necessary.
  3. Check the control module for proper functioning and reprogram or replace if needed.
  4. Test the circuit for continuity and repair any wiring issues or shorts found.
  5. Clear the DTC from the vehicle's memory and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P0955

The cost of repairing the Auto Shift Manual Mode Circuit issue can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, you can expect to pay anywhere from $200 to $500 for parts and labor. However, keep in mind that diagnostic time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to obtain quotes from multiple shops to get a more accurate estimate for your particular situation.

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Code P0955 Information for Specific Makes

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 P0955 Code

1. What does the OBDII code P0955 mean?

P0955 refers to an issue in the Auto Shift Manual Mode Circuit, which controls manual gear-shifting functionality in vehicles equipped with automatic transmissions.

2. What are the common symptoms of a P0955 code?

Symptoms may include the inability to use manual shift mode, erratic shifting, the transmission stuck in one gear, or the illumination of the check engine light.

3. What causes the P0955 code to appear?

Possible causes include a faulty manual shift switch, damaged wiring or connectors in the manual mode circuit, or issues with the transmission control module (TCM).

4. Can I drive my car with a P0955 code?

While the vehicle may still be drivable, you may lose manual shifting functionality and experience limited performance. Prolonged driving without addressing the issue could cause further damage.

5. How is the P0955 code diagnosed?

A mechanic will typically use a scan tool to confirm the code, inspect the manual mode switch, test the circuit for continuity, and check for wiring damage or loose connections.

6. How do I fix a P0955 code?

Repair options may include replacing the manual shift switch, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the TCM if necessary.

7. How much does it cost to repair a P0955 code?

Repair costs vary, but replacing a manual shift switch typically ranges from $150 to $300, depending on labor rates and the specific vehicle.

8. Can a blown fuse cause a P0955 code?

Yes, a blown fuse in the circuit controlling the manual shift mode can trigger the P0955 code. Checking the fuse is a good starting point.

9. Will clearing the code with a scanner solve the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be fixed to prevent the code from returning.

10. Is the P0955 code specific to any vehicle make?

No, the P0955 code is a generic OBDII code and can appear on various makes and models, but the exact repair steps may vary depending on the vehicle.

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