AutoCodes – GMC – P2228 GMC

P2228 GMC Code - Barometric Pressure Sensor Circuit Low 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: P2228 GMC indicates Barometric Pressure Sensor Circuit Low 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 10,324

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 21, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2228 GMC 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 less than 2.0 V for greater than 4 s.

OBDII Code P2228 GMC - Barometric Pressure Sensor Circuit Low Voltage - AutoCodes.com — P2228 GMC Code - Barometric Pressure Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2228 GMC?

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 P2228 GMC?

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 P2228 GMC 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 P2228 GMC code?

Need more information on how to fix the P2228 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2228 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P2228 2014 GMC Sierra — Barometric Pressure Sensor Circuit Low Voltage
P2228 2015 GMC Sierra — Barometric Pressure Sensor Circuit Low Voltage
P2228 2016 GMC Sierra — Barometric Pressure Sensor Circuit Low Voltage
P2228 2017 GMC Sierra — Barometric Pressure Sensor Circuit Low Voltage
P2228 2018 GMC Sierra — Barometric Pressure Sensor Circuit Low Voltage

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 P2228 GMC Code

What does the OBDII code P2228 mean for my GMC?

The P2228 code indicates that the Barometric Pressure Sensor circuit is experiencing low voltage, which can affect the engine's performance and fuel management.

What are some common symptoms of the P2228 code?

Common symptoms may include poor engine performance, reduced fuel efficiency, illuminated check engine light, rough idling, and difficulty starting the engine.

What could cause the P2228 code to trigger?

Possible causes include a faulty barometric pressure sensor, damaged wiring or connectors in the sensor circuit, a blown fuse, or issues with the engine control module (ECM).

How can I diagnose the P2228 code?

To diagnose the P2228 code, check the barometric pressure sensor and its wiring for damage, ensure proper electrical connections, and test the sensor's voltage output using a multimeter.

What should I check first if my GMC shows the P2228 code?

Start by inspecting the barometric pressure sensor and its wiring for any visible damage, corrosion, or loose connections. Next, test the sensor's voltage output to see if it is functioning properly.

Can I drive my vehicle with the P2228 code?

While you may be able to drive your vehicle, it is not recommended as the low voltage can lead to poor engine performance and potential long-term damage if left unaddressed.

What repairs are typically needed to fix the P2228 code?

Repairs may involve replacing the barometric pressure sensor, repairing or replacing damaged wiring or connectors, or addressing any issues with the ECM if necessary.

How much does it usually cost to repair the P2228 code?

Repair costs can vary widely depending on the specific issue, but replacing a barometric pressure sensor typically ranges from $100 to $250, including parts and labor.

Is the P2228 code serious?

The P2228 code can be serious as it affects engine performance and fuel efficiency. It is advisable to address the issue promptly to avoid further complications.

Can I clear the P2228 code after repairs?

Yes, after resolving the issue, you can clear the P2228 code using an OBDII scanner. However, it's recommended to ensure the issue is fully resolved before clearing the code to prevent it from returning.