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Engine-Codes – Generic – P2555

P2555 Code - Throttle Actuator Control Inhibit Circuit High Voltage

Quick Answer

The P2555 diagnostic trouble code indicates a problem with the throttle actuator control inhibit circuit having high voltage. Common causes include Faulty throttle actuator control module, Wiring issues or loose connections in the throttle actuator circuit, Corrosion or damage to electrical connectors. 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
P2555 indicates Throttle Actuator Control Inhibit Circuit High Voltage.
Common causes
Common causes include Faulty throttle actuator control module, Wiring issues or loose connections in the throttle actuator circuit, Corrosion or damage to electrical connectors.
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 Aug 30, 2024
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Code P2555 Description

The P2555 diagnostic trouble code indicates a problem with the throttle actuator control inhibit circuit having high voltage. This code is typically found in vehicles with electronic throttle control systems. The throttle actuator control module is responsible for managing the throttle body's operation, controlling the amount of air entering the engine for combustion. When the circuit has high voltage, it means that there is an issue with the electrical signal being sent to the throttle actuator, which can affect the vehicle's performance.

OBDII Code P2555 - Throttle Actuator Control Inhibit Circuit High Voltage
P2555 Code - Throttle Actuator Control Inhibit Circuit High Voltage

Common Causes of P2555

  1. Faulty throttle actuator control module.
  2. Wiring issues or loose connections in the throttle actuator circuit.
  3. Corrosion or damage to electrical connectors.
  4. Faulty throttle position sensor.
  5. Issues with the engine control module.

Symptoms of P2555

  1. Engine hesitation or lack of response when pressing the gas pedal.
  2. Engine stalling or rough idling.
  3. Reduced acceleration and power.
  4. Check engine light illuminated on the dashboard.
  5. Vehicle going into limp mode.

How to Fix P2555

  1. Start by conducting a thorough visual inspection of the throttle actuator control circuit and connectors, looking for any signs of damage or corrosion.
  2. Use a multimeter to test the voltage and resistance of the throttle actuator control circuit to pinpoint the exact issue.
  3. Replace any faulty components such as the throttle actuator control module, throttle position sensor, or damaged wiring.
  4. Clear the diagnostic trouble codes from the vehicle's engine control module using a scan tool.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the engine operates smoothly.

Cost to Fix P2555

The typical repair costs for addressing a P2555 code can range from $200 to $500, including parts and labor. However, it's important to note that the specific diagnosis 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 check with local auto repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P2555

The Throttle Control Actuator (TAC) module is part of the Throttle Body Assembly and is not serviceable. The Throttle Body Assembly needs to be replaced to fix the problem.

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Code P2555 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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