AutoCodes – MINI – P157F MINI

P157F MINI 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 MINI 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 1,081
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jan 01, 2020
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Code P157F MINI 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 MINI - Idle Throttle Valve Actuator 2 Open Circuit - AutoCodes.com
P157F MINI Code - Idle Throttle Valve Actuator 2 Open Circuit

What are the Possible Causes of the DTC P157F MINI?

  • 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 MINI?

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 MINI 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.

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Need Help with the Code?

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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 P157F MINI Code

1. What does the OBDII code P157F mean for a MINI?

P157F indicates an "Idle Throttle Valve Actuator 2 Open Circuit," meaning there is an electrical problem with the secondary throttle actuator circuit.

2. What are the common symptoms of a P157F code in a MINI?

Symptoms may include rough idling, reduced engine performance, stalling, or the check engine light turning on.

3. What causes the P157F code to appear?

Common causes include a faulty throttle valve actuator, damaged wiring or connectors in the circuit, or a malfunctioning engine control module (ECM).

4. Can I drive my MINI with a P157F code?

Driving with this code is not recommended, as it can lead to poor engine performance and potential stalling, which may compromise safety.

5. How is the P157F code diagnosed?

Technicians typically inspect the wiring and connectors, test the throttle valve actuator, and check for proper voltage and continuity in the circuit.

6. What repairs can fix the P157F code?

Repairs may include replacing the throttle valve actuator, repairing damaged wiring or connectors, or updating/reprogramming the ECM if necessary.

7. How much does it cost to repair a P157F code?

The cost depends on the specific repair required, but throttle valve actuator replacement typically ranges from $300 to $700, including parts and labor.

8. Can I clear the P157F code without fixing the problem?

Clearing the code without fixing the underlying issue will likely cause the code to return and may lead to further engine problems.

9. How can I prevent the P157F code from occurring?

Regular maintenance, inspecting wiring for damage, and ensuring the throttle body is clean can help prevent this issue.

10. Does a P157F code always mean the throttle actuator is faulty?

No, the issue could also stem from wiring problems, a poor electrical connection, or an ECM fault. Proper diagnosis is essential.

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