AutoCodes – Generic – P157F

P157F Code - Idle Throttle Valve Actuator 2 Open Circuit

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: P157F indicates Idle Throttle Valve Actuator 2 Open Circuit.
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.

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Code Popularity 2,372

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
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Code P157F 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 P157F - Idle Throttle Valve Actuator 2 Open Circuit - AutoCodes.com — P157F Code - Idle Throttle Valve Actuator 2 Open Circuit

What does this mean?

What are the Possible Causes of the DTC P157F?

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 P157F?

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 P157F 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 P157F code?

Need more information on how to fix the P157F code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P157F code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P157F BMW — Idle Throttle Valve Actuator 2 Open Circuit
P157F MINI — Idle Throttle Valve Actuator 2 Open Circuit

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 P157F Code

1. What are the common symptoms of OBDII code P157F (Idle Throttle Valve Actuator 2 Open Circuit)?

- Common symptoms include rough idle, stalling at idle, reduced engine performance, and the Check Engine Light illuminating on the dashboard.

2. What can cause the OBDII code P157F to trigger?

- The code P157F is typically triggered by a malfunction in the idle throttle valve actuator 2 circuit, which can be caused by wiring issues, a faulty actuator, or a poor connection.

3. How can I diagnose the cause of OBDII code P157F?

- Diagnosing the cause of code P157F involves checking the wiring and connections related to the idle throttle valve actuator 2, testing the actuator itself for proper functioning, and using a scan tool to monitor live data while the engine is running.

4. Can I drive my vehicle with OBDII code P157F present?

- It is not recommended to drive your vehicle with code P157F present, as it can lead to further damage to the engine or other components. It is best to address the issue promptly.

5. How can I repair OBDII code P157F (Idle Throttle Valve Actuator 2 Open Circuit)?

- Repairing code P157F involves inspecting and repairing any damaged wiring or connectors, replacing the faulty idle throttle valve actuator 2 if necessary, and clearing the trouble code with a scan tool.

6. Is it safe to continue driving if the Check Engine Light is flashing due to OBDII code P157F?

- A flashing Check Engine Light indicates a severe issue that requires immediate attention. It is not safe to continue driving the vehicle in this condition, as it could lead to engine damage or safety hazards.

7. Can a DIY enthusiast fix OBDII code P157F at home?

- Depending on the cause of the code, DIY enthusiasts with knowledge of automotive repair may be able to address code P157F at home by following diagnostic procedures, checking wiring connections, and replacing the idle throttle valve actuator 2 if needed.

8. How much does it typically cost to repair OBDII code P157F at a mechanic or dealership?

- The cost of repairing code P157F can vary depending on the cause of the issue, labor rates in your area, and the cost of parts. It is recommended to obtain quotes from different mechanics or dealerships for an accurate estimate.

9. Will disconnecting the battery reset OBDII code P157F?

- Disconnecting the battery may temporarily clear the trouble code, but it will not fix the underlying issue causing code P157F. It is important to diagnose and repair the problem to prevent the code from reoccurring.

10. How soon should I address OBDII code P157F to prevent further damage?

- It is advisable to address code P157F as soon as possible to prevent further damage to the engine or other components. Ignoring the issue can lead to poor engine performance, stalling, or other potential problems.