Engine-CodesGeneric – P0595

P0595 Code - Speed Control Servo Control Circuit Low

Quick Answer

The P0595 code indicates a problem with the Speed Control Servo Control Circuit being low. Common causes include Faulty speed control servo, Damaged wiring or connectors in the circuit, Malfunctioning ECM. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P0595 indicates Speed Control Servo Control Circuit Low.
Common causes
Common causes include Faulty speed control servo, Damaged wiring or connectors in the circuit, Malfunctioning ECM.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0595 Description

The P0595 code indicates a problem with the Speed Control Servo Control Circuit being low. This means that the engine control module (ECM) has detected a voltage signal from the speed control servo that is lower than the specified range. The speed control servo is responsible for controlling the vehicle's speed based on input from the driver through the accelerator pedal.

OBDII Code P0595 - Speed Control Servo Control Circuit Low
P0595 Code - Speed Control Servo Control Circuit Low

Common Causes of P0595

  1. Faulty speed control servo
  2. Damaged wiring or connectors in the circuit
  3. Malfunctioning ECM
  4. Corrosion in the circuit
  5. Electrical short in the circuit

Symptoms of P0595

  1. Inability to maintain a constant speed
  2. Poor acceleration
  3. Decreased fuel efficiency
  4. Check Engine Light illuminated
  5. Vehicle may go into limp mode

How to Fix P0595

  1. Begin by diagnosing the root cause of the issue using a diagnostic scanner to read the code and pinpoint the problem area.
  2. Inspect the speed control servo, wiring, and connectors for any visible damage or corrosion. Replace any faulty components.
  3. Test the circuit for continuity and proper voltage levels to identify any electrical issues.
  4. Clear the code from the ECM memory and test drive the vehicle to ensure that the speed control system is functioning correctly.
  5. If the issue persists, further diagnostics may be required to pinpoint the exact cause of the problem.

Cost to Fix P0595

The cost of repairing a P0595 code can vary depending on the specific cause of the issue and the make and model of the vehicle. On average, the repair costs for this issue can range from $100 to $300, including parts and labor. However, it is important to note that the final cost may be higher if additional components need to be replaced or if further diagnostics are required. It is recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your vehicle.

When is the Code Detected?

Open or shorted condition in the cruise control servo circuit

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Code P0595 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.

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