AutoCodes – BMW – P157D BMW

P157D BMW Code - Idle Throttle Valve Actuator 2

Quick Answer

The Engine Control Module (ECM) monitors the Idle Throttle Valve Actuator 2. Common causes include Faulty Idle Throttle Valve Actuator 2, Idle Throttle Valve Actuator 2 harness is open or shorted, Idle Throttle Valve Actuator 2 circuit poor electrical connection. 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: P157D BMW indicates Idle Throttle Valve Actuator 2.
Common causes: Common causes include Faulty Idle Throttle Valve Actuator 2, Idle Throttle Valve Actuator 2 harness is open or shorted, Idle Throttle Valve Actuator 2 circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,290

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P157D BMW Description

The Engine Control Module (ECM) monitors the Idle Throttle Valve Actuator 2. The ECM sets the OBDII code when the Idle Throttle Valve Actuator 2 is not to factory specifications.

OBDII Code P157D BMW - Idle Throttle Valve Actuator 2 - AutoCodes.com — P157D BMW Code - Idle Throttle Valve Actuator 2

What does this mean?

What are the Possible Causes of the DTC P157D BMW?

Faulty Idle Throttle Valve Actuator 2
Idle Throttle Valve Actuator 2 harness is open or shorted
Idle Throttle Valve Actuator 2 circuit poor electrical connection

How to Fix the DTC P157D BMW?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P157D BMW code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P157D BMW code?

Need more information on how to fix the P157D BMW code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P157D BMW code diagnosed by a professional: Find a repair shop in your area

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 P157D BMW Code

1. What does the OBDII code P157D mean on a BMW?

P157D refers to an issue with the Idle Throttle Valve Actuator 2, indicating a malfunction or abnormal performance detected in the secondary throttle valve system.

2. What are the symptoms of the P157D code in a BMW?

Common symptoms include rough idling, reduced engine performance, throttle response issues, and potentially the engine entering limp mode.

3. What causes the P157D code to appear on a BMW?

This code is typically caused by a faulty throttle valve actuator, wiring issues, electrical connection problems, or a malfunction in the engine control unit (ECU).

4. Can I drive my BMW with the P157D code active?

While the car may still be drivable, itâ€™s not recommended as it could lead to further engine performance issues or damage.

5. How is the P157D code diagnosed in a BMW?

A mechanic will use a diagnostic scanner to confirm the code, inspect the throttle valve actuator and its wiring, and check for any related issues in the ECU.

6. What repairs are needed to fix the P157D code?

Repairs may include replacing the throttle valve actuator, repairing or replacing damaged wiring, cleaning the throttle body, or updating the ECU software.

7. How much does it cost to fix the P157D code in a BMW?

Repair costs can vary, but replacing the throttle valve actuator typically ranges between $400 and $1,000, depending on parts and labor.

8. Can a dirty throttle body cause the P157D code?

Yes, a dirty or clogged throttle body can hinder proper actuator function and trigger this code.

9. Will clearing the P157D code with a scanner fix the issue?

Clearing the code may temporarily turn off the check engine light, but the underlying problem must be addressed to prevent the code from returning.

10. How can I prevent the P157D code from recurring in my BMW?

Regular maintenance, such as cleaning the throttle body and inspecting electrical connections, can help prevent issues with the throttle valve actuator.