Engine-CodesGeneric – P0951

P0951 Code - Auto Shift Manual Control Circuit Range/Performance

Quick Answer

The P0951 code refers to a Auto Shift Manual Control Circuit Range/Performance issue. Common causes include Damaged wiring or connectors in the auto shift manual control circuit, Malfunctioning auto shift manual control module, Low transmission fluid levels. 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
P0951 indicates Auto Shift Manual Control Circuit Range/Performance.
Common causes
Common causes include Damaged wiring or connectors in the auto shift manual control circuit, Malfunctioning auto shift manual control module, Low transmission fluid levels.
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 12, 2024
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Code P0951 Description

The P0951 code refers to a Auto Shift Manual Control Circuit Range/Performance issue. This code is set when the powertrain control module (PCM) detects that the voltage signal from the auto shift manual control circuit is outside of the expected range or performance parameters. The auto shift manual control circuit is responsible for controlling the shifting of the transmission in vehicles with automatic transmissions that also offer manual shifting capabilities. When this circuit is not functioning properly, it can lead to issues with shifting, potentially causing the transmission to shift erratically or not at all.

OBDII Code P0951 - Auto Shift Manual Control Circuit Range/Performance
P0951 Code - Auto Shift Manual Control Circuit Range/Performance

Common Causes of P0951

  1. Damaged wiring or connectors in the auto shift manual control circuit
  2. Malfunctioning auto shift manual control module
  3. Low transmission fluid levels
  4. Faulty transmission solenoid
  5. Mechanical issues within the transmission

Symptoms of P0951

  1. Erratic shifting behavior
  2. Difficulty shifting between gears
  3. Delayed or harsh shifting
  4. Transmission slipping
  5. Illumination of the check engine light

How to Fix P0951

  1. Begin by conducting a thorough inspection of the auto shift manual control circuit, checking for any damaged wiring or connectors. Repair or replace any damaged components as needed.
  2. Check the transmission fluid level and condition. Top off or replace the fluid if it is low or contaminated.
  3. Test the transmission solenoid for proper operation. Replace it if it is faulty.
  4. If the issue persists, perform a more in-depth diagnosis of the transmission itself, checking for any mechanical issues that may be causing the problem.
  5. Clear the diagnostic trouble codes from the PCM and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P0951

The typical repair costs for addressing a P0951 code can vary depending on the specific cause of the issue. On average, you can expect to pay anywhere from $200 to $500 for parts and labor. However, it's important to note that labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. It's recommended to check with local shops for a more accurate estimate of repair costs.

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Code P0951 Information for Specific Makes

  • P0951 Dodge — Auto Shift Manual Control 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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