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P2229 2018 GMC Sierra Code - Barometric Pressure Sensor Circuit High Voltage

Quick Answer

The P2229 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the Barometric Pressure (BARO) Sensor Circuit registering high voltage. Common causes include Faulty BARO sensor, Wiring or connector issues in the BARO sensor circuit, ECM software or hardware malfunction. 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 2018 GMC Sierra indicates Barometric Pressure Sensor Circuit High Voltage.
Common causes
Common causes include Faulty BARO sensor, Wiring or connector issues in the BARO sensor circuit, ECM software or hardware malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P2229 2018 GMC Sierra Description

The P2229 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the Barometric Pressure (BARO) Sensor Circuit registering high voltage. The BARO sensor is a crucial component of the vehicle's engine management system, responsible for measuring the atmospheric pressure outside the vehicle. This information is used by the engine control module (ECM) to adjust fuel delivery and ignition timing, optimizing engine performance and efficiency.

OBDII Code P2229 2018 GMC Sierra - Barometric Pressure Sensor Circuit High Voltage
P2229 2018 GMC Sierra Code - Barometric Pressure Sensor Circuit High Voltage

Common Causes of P2229 2018 GMC Sierra

  1. Faulty BARO sensor
  2. Wiring or connector issues in the BARO sensor circuit
  3. ECM software or hardware malfunction
  4. Vacuum leaks affecting BARO sensor readings

Symptoms of P2229 2018 GMC Sierra

  1. Decreased fuel efficiency
  2. Rough idling
  3. Engine misfires
  4. Stalling

How to Fix P2229 2018 GMC Sierra

  1. Begin by conducting a visual inspection of the BARO sensor and its wiring, looking for any signs of damage or corrosion. Replace any damaged components.
  2. Use a multimeter to test the BARO sensor's voltage output to determine if it is within the manufacturer's specifications. Replace the sensor if necessary.
  3. Check the wiring harness and connectors for any loose connections or breaks. Repair or replace as needed.
  4. Clear the DTC from the ECM memory using a diagnostic scanner and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, consult a professional mechanic for further diagnosis and potential ECM reprogramming.

Cost to Fix P2229 2018 GMC Sierra

The typical repair costs for addressing a P2229 DTC related to the Barometric Pressure Sensor Circuit High Voltage in a 2018 GMC Sierra may range from $150 to $400, depending on the specific cause of the issue and the cost of replacement parts and labor. It's important to note that the exact cost can vary based on factors such as the location of the repair, the vehicle's make and model, and the mechanic's labor rates. It's recommended to obtain quotes from multiple repair shops to ensure a competitive price for the repair.

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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 2018 GMC Sierra Code

1. What are common symptoms of OBDII code P2229 in a 2018 GMC Sierra?

The common symptoms of OBDII code P2229 (Barometric Pressure Sensor Circuit High Voltage) in a 2018 GMC Sierra may include poor engine performance, reduced fuel efficiency, and possibly an illuminated check engine light.

2. What can cause the OBDII code P2229 in a 2018 GMC Sierra?

The OBDII code P2229 in a 2018 GMC Sierra is typically caused by a malfunctioning barometric pressure sensor, wiring issues in the sensor circuit, or a faulty engine control module (ECM).

3. How is the barometric pressure sensor related to OBDII code P2229 in a 2018 GMC Sierra?

The barometric pressure sensor is responsible for measuring the atmospheric pressure, which is crucial for the proper operation of the engine. If this sensor malfunctions or reports high voltage, it can trigger the OBDII code P2229.

4. Can a dirty air filter trigger OBDII code P2229 in a 2018 GMC Sierra?

Yes, a dirty air filter can indirectly affect the barometric pressure sensor readings by altering the airflow to the engine. This can potentially lead to the generation of the OBDII code P2229 due to incorrect pressure readings.

5. How can I diagnose and repair OBDII code P2229 in my 2018 GMC Sierra?

Diagnosing and repairing OBDII code P2229 may involve checking the barometric pressure sensor and its wiring for any faults, testing the sensor's voltage output, and inspecting the ECM for issues. Repairing may involve replacing the sensor, repairing wiring faults, or reprogramming the ECM.

6. Is it safe to continue driving with OBDII code P2229 illuminated in my 2018 GMC Sierra?

While the vehicle may still be operable with the OBDII code P2229 present, it is recommended to address the issue promptly to prevent any potential engine performance issues, reduced fuel efficiency, or further damage to components.

7. Can resetting the OBDII code P2229 in a 2018 GMC Sierra make it disappear permanently?

Resetting the OBDII code P2229 may temporarily turn off the check engine light, but if the underlying issue causing the fault code is not addressed, the code is likely to reappear after some driving cycles.

8. Is it possible to prevent OBDII code P2229 from occurring in a 2018 GMC Sierra?

Regular maintenance, such as checking and replacing the air filter as needed, can help prevent issues that may trigger the OBDII code P2229. Additionally, timely diagnosis and repair of any related sensor or wiring problems can help prevent the code from appearing.

9. Can extreme weather conditions trigger OBDII code P2229 in a 2018 GMC Sierra?

Extreme weather conditions, especially drastic changes in barometric pressure, can potentially affect the barometric pressure sensor readings and lead to the triggering of OBDII code P2229 in a 2018 GMC Sierra.

10. How long does it typically take to repair OBDII code P2229 in a 2018 GMC Sierra?

The time taken to repair OBDII code P2229 in a 2018 GMC Sierra can vary depending on the exact cause of the issue. Simple repairs such as sensor replacement may take a short time, while more complex issues involving wiring or ECM may require more extensive troubleshooting and repair.

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