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Engine-Codes – Generic – P155E

P155E Code - Throttle Valve Actuator 2 Position Error

Quick Answer

The P155E diagnostic trouble code (DTC) refers to a Throttle Valve Actuator 2 Position Error. Common causes include Faulty throttle valve actuator: The actuator itself may be malfunctioning and not properly responding to commands, Wiring issues: Electrical connections to the actuator may be loose, damaged, or corroded, Mechanical obstruction: The throttle valve may be physically obstructed or stuck, preventing it from moving freely. 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
P155E indicates Throttle Valve Actuator 2 Position Error.
Common causes
Common causes include Faulty throttle valve actuator: The actuator itself may be malfunctioning and not properly responding to commands, Wiring issues: Electrical connections to the actuator may be loose, damaged, or corroded, Mechanical obstruction: The throttle valve may be physically obstructed or stuck, preventing it from moving freely.
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 P155E Description

The P155E diagnostic trouble code (DTC) refers to a Throttle Valve Actuator 2 Position Error. This means that there is a problem with the position of the throttle valve actuator in the vehicle's engine. The throttle valve actuator is responsible for controlling the airflow into the engine, which is crucial for proper combustion and engine performance. When this component malfunctions, it can lead to a variety of issues that can affect the vehicle's drivability and overall performance.

OBDII Code P155E - Throttle Valve Actuator 2 Position Error
P155E Code - Throttle Valve Actuator 2 Position Error

Common Causes of P155E

  1. Faulty throttle valve actuator: The actuator itself may be malfunctioning and not properly responding to commands.
  2. Wiring issues: Electrical connections to the actuator may be loose, damaged, or corroded.
  3. Mechanical obstruction: The throttle valve may be physically obstructed or stuck, preventing it from moving freely.
  4. Software or calibration issues: The engine control module (ECM) may not be receiving accurate positioning data from the actuator.
  5. Environmental factors: Extreme temperatures or moisture can affect the actuator's performance.

Symptoms of P155E

  1. Loss of power: The engine may struggle to accelerate or maintain speed.
  2. Rough idling: The engine may idle erratically or stall.
  3. Decreased fuel efficiency: The vehicle may experience poor fuel economy.
  4. Check Engine Light: The vehicle's onboard diagnostic system may illuminate the Check Engine Light.
  5. Reduced throttle response: The vehicle may be unresponsive or sluggish when accelerating.

How to Fix P155E

  1. Diagnose the issue: Use a scan tool to retrieve the DTC and perform a visual inspection of the throttle valve actuator and wiring.
  2. Test the actuator: Check the actuator's functionality by applying voltage and verifying movement.
  3. Repair or replace components: Repair any damaged wiring or connections, or replace the throttle valve actuator if necessary.
  4. Clear the DTC: Once the repair is complete, clear the DTC and test drive the vehicle to ensure proper operation.
  5. Perform a relearn procedure: Some vehicles may require a throttle relearn procedure to recalibrate the system.

Cost to Fix P155E

The cost to repair a Throttle Valve Actuator 2 Position Error can vary depending on the extent of the issue and the specific components that need to be repaired or replaced. In general, the cost can range from $200 to $500 for parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to check with local shops for a more accurate estimate.

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Code P155E 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 P155E Code

1. What are the common symptoms of OBDII code P155E (Throttle Valve Actuator 2 Position Error)?

The common symptoms of code P155E may include rough idling, reduced engine power, hesitation or stalling when accelerating, and illuminated Check Engine Light.

2. What causes OBDII code P155E to trigger?

Code P155E is typically triggered by issues with the throttle valve actuator, such as a faulty actuator motor, wiring problems, or a malfunctioning throttle position sensor.

3. How can I diagnose OBDII code P155E?

Diagnosing code P155E may involve using a scan tool to read the code and perform a thorough inspection of the throttle valve actuator, motor, and related components for any signs of damage or malfunction.

4. What are some possible repair tips for fixing OBDII code P155E?

Repairing code P155E may involve cleaning or replacing the throttle valve actuator, repairing any damaged wiring or connectors, resetting the throttle position sensor, or performing a throttle body relearn procedure.

5. Can I drive my vehicle with OBDII code P155E present?

It is not recommended to drive your vehicle with code P155E present, as it can cause drivability issues and potentially lead to further damage to the throttle system or other components.

6. How serious is OBDII code P155E?

Code P155E should be addressed promptly, as it can affect the performance and drivability of your vehicle. Ignoring this code may lead to more severe issues over time.

7. Is it possible to clear OBDII code P155E without fixing the underlying problem?

Clearing the code without addressing the underlying issue will only temporarily turn off the Check Engine Light. The code is likely to reappear until the root cause is resolved.

8. Can a DIY enthusiast repair OBDII code P155E at home?

Repairing code P155E may require some mechanical knowledge and tools. DIY enthusiasts with experience in automotive repairs may be able to address this code at home, but it is recommended to consult a professional if unsure.

9. How much does it typically cost to repair OBDII code P155E at a mechanic or dealership?

The cost of repairing code P155E can vary depending on the extent of the issue, labor rates, and parts needed. It is advisable to obtain quotes from different mechanics or dealerships for an accurate estimate.

10. Are there any preventive maintenance measures to avoid OBDII code P155E in the future?

To prevent code P155E from reoccurring, it is recommended to maintain your vehicle regularly, including cleaning the throttle body, inspecting the throttle system for any signs of wear or damage, and addressing any issues promptly.

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