Engine-CodesGeneric – P0956

P0956 Code - Auto Shift Manual Mode Circuit Range/Performance

Quick Answer

The diagnostic trouble code P0956 indicates a problem with the auto shift manual mode circuit's range or performance in the vehicle's transmission system. Common causes include Faulty auto shift manual mode switch, Wiring or electrical connection issues, Defective transmission 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
P0956 indicates Auto Shift Manual Mode Circuit Range/Performance.
Common causes
Common causes include Faulty auto shift manual mode switch, Wiring or electrical connection issues, Defective transmission 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.
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P0956 Description

The diagnostic trouble code P0956 indicates a problem with the auto shift manual mode circuit's range or performance in the vehicle's transmission system. This code is typically found in vehicles with automatic transmissions that offer a manual shifting mode, allowing the driver to manually select gears for a more dynamic driving experience. When this code is triggered, it means that the vehicle's onboard computer has detected a discrepancy in the operation of the auto shift manual mode circuit, which can affect the vehicle's performance and drivability.

OBDII Code P0956 - Auto Shift Manual Mode Circuit Range/Performance
P0956 Code - Auto Shift Manual Mode Circuit Range/Performance

Common Causes of P0956

  1. Faulty auto shift manual mode switch
  2. Wiring or electrical connection issues
  3. Defective transmission control module
  4. Low transmission fluid level
  5. Internal transmission damage

Symptoms of P0956

  1. Difficulty shifting gears
  2. Erratic shifting behavior
  3. Inability to engage manual mode
  4. Reduced acceleration
  5. Decreased fuel efficiency

How to Fix P0956

  1. Begin by conducting a thorough inspection of the auto shift manual mode circuit, including the switch, wiring, and connections.
  2. Test the auto shift manual mode switch for proper functionality and replace if necessary.
  3. Check the transmission control module for any faults or errors and address as needed.
  4. Inspect the transmission fluid level and quality, topping up or replacing as required.
  5. If the issue persists, perform a detailed diagnostic of the transmission system to identify any internal damage or malfunctions that may be causing the problem.

Cost to Fix P0956

The typical repair costs for addressing the P0956 code can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the parts and labor for this repair could range from $200 to $500. However, it's important to note that the actual cost may differ based on factors such as the vehicle make and model, the location of the repair shop, and the hourly labor rates. It is advisable to obtain a detailed quote from a trusted auto repair shop to get a more accurate estimate for this repair.

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Code P0956 Information for Specific Makes

  • P0956 Dodge — Auto Shift Manual Mode Circuit Range/Performance
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.

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