AutoCodes – MINI – P0129 MINI

P0129 MINI Code - Barometric Pressure Too Low

Quick Answer

The Engine Control Module (ECM) monitors the Barometric Pressure Sensor. Common causes include Faulty Barometric Pressure Sensor, Barometric Pressure Sensor harness is open or shorted, Barometric 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: P0129 MINI indicates Barometric Pressure Too Low.
Common causes: Common causes include Faulty Barometric Pressure Sensor, Barometric Pressure Sensor harness is open or shorted, Barometric 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 2,173

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 30, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0129 MINI Description

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

OBDII Code P0129 MINI - Barometric Pressure Too Low - AutoCodes.com — P0129 MINI Code - Barometric Pressure Too Low

What does this mean?

What are the Possible Causes of the DTC P0129 MINI?

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

How to Fix the DTC P0129 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 P0129 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 P0129 MINI code?

Need more information on how to fix the P0129 MINI code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0129 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 P0129 MINI Code

1. What are the common symptoms of OBDII code P0129 in a MINI Cooper?

- Common symptoms include reduced engine performance, rough idle, stalling, and decreased fuel efficiency.

2. What causes the OBDII code P0129 "Barometric Pressure Too Low" in a MINI vehicle?

- The code is usually triggered by a faulty barometric pressure sensor, a vacuum leak in the intake system, or issues with the engine's air-fuel mixture.

3. Can a dirty air filter trigger the OBDII code P0129 in a MINI Cooper?

- Yes, a dirty air filter can restrict airflow to the engine, affecting the barometric pressure readings and potentially triggering the code.

4. How can I diagnose the underlying issue causing the OBDII code P0129 in my MINI Cooper?

- Diagnosis typically involves checking the barometric pressure sensor, inspecting for vacuum leaks, testing the intake system, and verifying the air filter's condition.

5. What are some repair tips for addressing the OBDII code P0129 "Barometric Pressure Too Low" in a MINI vehicle?

- Repair tips may include replacing the barometric pressure sensor, fixing any vacuum leaks, cleaning or replacing the air filter, and ensuring proper air intake system function.

6. Is it safe to continue driving my MINI Cooper with the OBDII code P0129 present?

- It is not recommended to drive with the code active, as it can lead to engine performance issues and potential damage if left unresolved.

7. How much does it typically cost to repair the OBDII code P0129 in a MINI vehicle?

- Repair costs can vary depending on the specific cause of the code, but they may range from $100 to $300 for parts and labor.

8. Can resetting the OBDII system clear the P0129 code temporarily in a MINI Cooper?

- Resetting the system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

9. Will the OBDII code P0129 cause my MINI Cooper to fail an emissions test?

- Yes, the code may cause your MINI Cooper to fail an emissions test, as it indicates a problem with the vehicle's emissions control system.

10. How can I prevent the OBDII code P0129 from recurring in my MINI vehicle?

- Regular maintenance, such as replacing the air filter, checking for vacuum leaks, and ensuring the barometric pressure sensor is functioning correctly, can help prevent the code from recurring.