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P155E BMW Code - Throttle Valve Actuator 2 Position Error

Quick Answer

The P155E BMW code indicates a Throttle Valve Actuator 2 Position Error. Common causes include Faulty throttle valve actuator, Wiring or electrical issues, Vacuum leak. 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 BMW indicates Throttle Valve Actuator 2 Position Error.
Common causes
Common causes include Faulty throttle valve actuator, Wiring or electrical issues, Vacuum leak.
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 10, 2024
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Code P155E BMW Description

The P155E BMW code indicates a Throttle Valve Actuator 2 Position Error. This means that there is a problem with the throttle valve actuator in the vehicle's engine system. The throttle valve actuator is responsible for controlling the amount of air that enters the engine, which is essential for proper combustion and engine performance. When this actuator is not functioning correctly, it can lead to a variety of issues with the vehicle's performance.

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

Common Causes of P155E BMW

  1. Faulty throttle valve actuator
  2. Wiring or electrical issues
  3. Vacuum leak
  4. Problem with the engine control module

Symptoms of P155E BMW

  1. Poor acceleration
  2. Decreased fuel efficiency
  3. Rough idling
  4. Stalling
  5. Lack of power when driving

How to Fix P155E BMW

  1. Diagnose the issue using a diagnostic scanner to pinpoint the exact cause of the error code.
  2. Inspect the throttle valve actuator for any signs of damage or malfunction.
  3. Check the wiring and electrical connections for any loose or damaged wires.
  4. Test for vacuum leaks using a smoke machine or other diagnostic tools.
  5. If necessary, replace the throttle valve actuator and reset the engine control module to clear the error code.

Cost to Fix P155E BMW

The typical repair costs for addressing a Throttle Valve Actuator 2 Position Error can vary depending on the extent of the issue and the specific parts and labor required. In general, the cost of replacing a throttle valve actuator can range from $200 to $500, including parts and labor. However, additional diagnostic time and labor rates at auto repair shops can impact the final cost. It's recommended to consult with a local auto repair shop for a more accurate estimate based on your vehicle make and model.

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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 BMW Code

1. What does the OBDII code P155E mean on a BMW?

P155E indicates a "Throttle Valve Actuator 2 Position Error," which means there is an issue with the second throttle valve actuator or its position sensor.

2. What are the common symptoms of the P155E code?

Symptoms include reduced engine performance, limp mode activation, rough idling, hesitation during acceleration, and the check engine light turning on.

3. What causes the P155E code to appear?

The code may be caused by a faulty throttle actuator, a damaged throttle position sensor, wiring issues, or a malfunction in the engine control module (ECM).

4. Can I drive my BMW with the P155E code?

While the car may still be drivable in limp mode, it is not recommended to drive for long periods as it can cause further damage or unsafe driving conditions.

5. How is the P155E code diagnosed?

A mechanic will use an OBDII scanner to confirm the code, inspect the throttle actuator and position sensor, check for damaged wiring, and perform tests on the ECM if needed.

6. How can I fix the P155E code on my BMW?

Repairs may include replacing the throttle actuator, repairing or replacing damaged wiring, cleaning the throttle body, or reprogramming/updating the ECM.

7. How much does it cost to fix the P155E code?

The repair cost varies depending on the issue but generally ranges from $300 to $1,200, with throttle actuator replacement being the most expensive part.

8. Can a dirty throttle body cause the P155E code?

Yes, a dirty or clogged throttle body can interfere with the actuator's function and trigger the P155E code.

9. Is the P155E code related to other throttle-related codes?

Yes, it may appear alongside other throttle-related codes like P0120 or P0638, which indicate similar issues with the throttle system.

10. Do I need to reset the code after repairs?

Yes, after completing the necessary repairs, the code should be cleared using an OBDII scanner to ensure the issue is resolved.

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