AutoCodes – Generic – P129A

P129A 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 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 8,958

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

What does this mean?

What are the Possible Causes of the DTC P129A?

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?

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 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 code?

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

Need Help with the Code?

Get the P129A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P129A BMW — Charge Air Pressure Sensor Run On Pressure Implausible
P129A MINI — Charge Air Pressure Sensor Run On Pressure Implausible

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 Code

1. What are the common symptoms of OBDII code P129A?

- Common symptoms of OBDII code P129A include reduced engine power, rough idling, poor acceleration, and potential stalling.

2. What does the OBDII code P129A "Charge Air Pressure Sensor Run On Pressure Implausible" indicate?

- This code typically indicates an issue with the charge air pressure sensor detecting an implausible pressure level in the intake system.

3. What are the possible causes of OBDII code P129A?

- Possible causes of code P129A include a faulty charge air pressure sensor, damaged wiring or connectors, intake system leaks, or issues with the turbocharger.

4. How can I diagnose the OBDII code P129A?

- To diagnose code P129A, you can use an OBDII scanner to read the code and then inspect the charge air pressure sensor, wiring connections, intake system, and turbocharger for any visible issues.

5. Can I drive my vehicle with the OBDII code P129A?

- It is not recommended to drive your vehicle with code P129A as it can lead to further engine damage and potential safety hazards. It's best to address the issue promptly.

6. How can I repair OBDII code P129A?

- Repairing code P129A may involve replacing the charge air pressure sensor, repairing any damaged wiring or connectors, fixing intake system leaks, or addressing turbocharger issues as needed.

7. Will resetting the OBDII code P129A make it go away permanently?

- Resetting the code may temporarily clear it, but if the underlying issue causing P129A is not addressed, the code is likely to reappear after driving the vehicle.

8. Are there any DIY repair tips for OBDII code P129A?

- DIY repair tips for code P129A include checking for loose or damaged wiring, ensuring proper sensor connection, and inspecting the intake system for leaks before seeking professional help if needed.

9. How much does it cost to fix OBDII code P129A?

- The cost to fix code P129A can vary depending on the specific issue causing the code, parts needed for repair, labor costs, and whether the repair is done at a dealership or an independent mechanic.

10. Can a faulty charge air pressure sensor trigger other OBDII codes besides P129A?

- Yes, a faulty charge air pressure sensor can potentially trigger other OBDII codes related to the intake system, turbocharger, or engine performance, so it's important to address the issue promptly.