AutoCodes – Buick – P2229 Buick

P2229 Buick Code - Barometric Pressure Sensor Circuit High Voltage

Quick Answer

The Barometric Pressure (BARO) sensor is integral to the multifunction intake air sensor and responds to changes in altitude and atmospheric conditions. Common causes include Faulty Barometric Pressure (BARO) Sensor (integrated within Mass Air Flow/Multifunction Intake Air 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
P2229 Buick indicates Barometric Pressure Sensor Circuit High Voltage.
Common causes
Common causes include Faulty Barometric Pressure (BARO) Sensor (integrated within Mass Air Flow/Multifunction Intake Air 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 2,959
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 21, 2022
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Code P2229 Buick Description

The Barometric Pressure (BARO) sensor is integral to the multifunction intake air sensor and responds to changes in altitude and atmospheric conditions. This gives the Engine Control Module (ECM) an indication of barometric pressure. The ECM uses this information to calculate fuel delivery. The BARO sensor provides a voltage signal to the ECM relative to the atmospheric pressure changes. The ECM monitors the BARO sensor signal for a voltage outside of the normal range. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the BARO sensor voltage is greater than 4.5 V for greater than 4 s.
OBDII Code P2229 Buick - Barometric Pressure Sensor Circuit High Voltage - AutoCodes.com
P2229 Buick Code - Barometric Pressure Sensor Circuit High Voltage

What are the Possible Causes of the DTC P2229 Buick?

  • Faulty Barometric Pressure (BARO) Sensor (integrated within Mass Air Flow/Multifunction Intake Air Sensor)
  • Barometric Pressure Sensor harness is open or shorted
  • Barometric Pressure Sensor circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P2229 Buick?

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 P2229 Buick 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 P2229 Buick code?

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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 P2229 Buick Code

1. What are the common symptoms of OBDII code P2229 in a Buick related to the barometric pressure sensor circuit high voltage issue?

- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.

2. What typically causes the OBDII code P2229 in a Buick indicating a high voltage in the barometric pressure sensor circuit?

- The code is usually triggered by a faulty barometric pressure sensor, damaged wiring, or a problem with the sensor circuit's connections.

3. How can I diagnose the OBDII code P2229 in my Buick related to the barometric pressure sensor circuit high voltage problem?

- Diagnosing the issue involves inspecting the barometric pressure sensor and its wiring for any visible damage, using a multimeter to check for proper voltage readings, and conducting a thorough visual inspection.

4. Can I continue driving my Buick with the OBDII code P2229 indicating a high voltage in the barometric pressure sensor circuit?

- It is not recommended to drive the vehicle with this code present, as it can lead to further engine damage and potential safety hazards. It is best to address the issue promptly.

5. How do I repair the OBDII code P2229 in my Buick due to the barometric pressure sensor circuit high voltage issue?

- Repairing the problem may involve replacing the barometric pressure sensor, repairing or replacing damaged wiring, or addressing any faulty connections in the sensor circuit.

6. Are there any DIY tips for troubleshooting the OBDII code P2229 in a Buick associated with the barometric pressure sensor circuit high voltage fault?

- DIY troubleshooting tips include checking the sensor's connector for corrosion, ensuring the sensor is securely mounted, and verifying the wiring for any breaks or shorts.

7. Will resetting the OBDII code P2229 in my Buick make the issue go away temporarily?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the high voltage in the barometric pressure sensor circuit is not addressed, the code is likely to return.

8. How long does it typically take to repair the OBDII code P2229 in a Buick caused by a high voltage in the barometric pressure sensor circuit?

- The repair time can vary depending on the exact cause of the issue, but it may take anywhere from 1 to 3 hours to diagnose and fix the problem.

9. Is it necessary to visit a dealership or mechanic to resolve the OBDII code P2229 in a Buick related to the barometric pressure sensor circuit high voltage problem?

- While visiting a professional technician is recommended for accurate diagnosis and repair, experienced DIYers with the right tools and knowledge may be able to address the issue themselves.

10. Can extreme weather conditions or altitude changes contribute to triggering the OBDII code P2229 in a Buick due to the barometric pressure sensor circuit high voltage fault?

- Yes, extreme weather conditions or sudden altitude changes can sometimes affect the barometric pressure sensor readings, potentially leading to the triggering of this diagnostic trouble code.

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