AutoCodes – MINI – P129A MINI

P129A MINI Code - Charge Air Pressure Sensor Run On Pressure Implausible

Quick Answer

The Engine Control Module (ECM) monitors the Charge Air Pressure Sensor. Common causes include Faulty Charge Air Pressure Sensor, Charge Air Pressure Sensor harness is open or shorted, Charge Air Pressure Sensor 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: P129A MINI indicates Charge Air Pressure Sensor Run On Pressure Implausible.
Common causes: Common causes include Faulty Charge Air Pressure Sensor, Charge Air Pressure Sensor harness is open or shorted, Charge Air Pressure Sensor 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 1,655

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 Sep 08, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P129A MINI Description

The Engine Control Module (ECM) monitors the Charge Air Pressure Sensor. The ECM sets the OBDII code when the Charge Air Pressure Sensor is not to factory specifications.

OBDII Code P129A MINI - Charge Air Pressure Sensor Run On Pressure Implausible - AutoCodes.com — P129A MINI Code - Charge Air Pressure Sensor Run On Pressure Implausible

What does this mean?

What are the Possible Causes of the DTC P129A MINI?

Faulty Charge Air Pressure Sensor
Charge Air Pressure Sensor harness is open or shorted
Charge Air Pressure Sensor circuit poor electrical connection

How to Fix the DTC P129A 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 P129A 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.

Need more information about the P129A MINI code?

Need more information on how to fix the P129A MINI code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P129A MINI 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 P129A MINI Code

1. What are the common symptoms of OBDII code P129A in a MINI related to the Charge Air Pressure Sensor Run On Pressure Implausible issue?

- Common symptoms include loss of power, rough idling, engine stalling, and the vehicle going into limp mode.

2. What are the possible causes of the Charge Air Pressure Sensor Run On Pressure Implausible code P129A in a MINI?

- Possible causes may include a faulty charge air pressure sensor, a boost leak in the intake system, a damaged intercooler, or issues with the turbocharger.

3. How can I diagnose the cause of OBDII code P129A in my MINI?

- Diagnosis usually involves using a scan tool to read the code, checking the charge air pressure sensor's wiring and connections, inspecting the intake system for leaks, and testing the turbocharger's functionality.

4. Can driving with the P129A code present cause further damage to my MINI?

- Continuing to drive with this code may lead to reduced engine performance, potential damage to the turbocharger, and increased fuel consumption. It is advisable to address the issue promptly.

5. Is it safe to clear the P129A code and continue driving without addressing the underlying issue?

- Clearing the code without fixing the root cause is not recommended, as the problem may persist and potentially worsen over time. It is best to address the issue to ensure optimal engine performance and reliability.

6. Are there any DIY repair tips for resolving the Charge Air Pressure Sensor Run On Pressure Implausible code in a MINI?

- DIY repair tips may include checking and cleaning the charge air pressure sensor, inspecting and repairing any visible leaks in the intake system, and ensuring all connections are secure.

7. How much does it typically cost to repair the P129A code in a MINI at a professional auto repair shop?

- Repair costs can vary depending on the specific cause of the issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can a faulty charge air pressure sensor be repaired, or does it need to be replaced?

- In most cases, a faulty charge air pressure sensor will need to be replaced with a new one to resolve the P129A code and restore proper engine performance.

9. Will resetting the ECU help clear the P129A code temporarily?

- Resetting the ECU may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to reappear once the problem is detected again during vehicle operation.

10. How urgent is it to address the Charge Air Pressure Sensor Run On Pressure Implausible code P129A in a MINI?

- It is advisable to address the P129A code promptly to prevent potential engine damage, ensure optimal performance, and avoid further complications while driving.