AutoCodes – GMC – P227C 2014 GMC Sierra

P227C 2014 GMC Sierra Code - Barometric Pressure Sensor 2 Circuit Low Voltage

Quick Answer

The Barometric Pressure (BARO) Sensor 2, also referred to as the Turbocharger Inlet Air Pressure (TCIAP) sensor, is integral to the Multifunction Intake Air Sensor and is used for humidity sensor signal correction. Common causes include Faulty Multifunction Intake Air Sensor, Multifunction Intake Air Sensor harness is open or shorted, Multifunction Intake Air 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: P227C 2014 GMC Sierra indicates Barometric Pressure Sensor 2 Circuit Low Voltage.
Common causes: Common causes include Faulty Multifunction Intake Air Sensor, Multifunction Intake Air Sensor harness is open or shorted, Multifunction Intake Air 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 167

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Oct 01, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P227C 2014 GMC Sierra Description

The Barometric Pressure (BARO) Sensor 2, also referred to as the Turbocharger Inlet Air Pressure (TCIAP) sensor, is integral to the Multifunction Intake Air Sensor and is used for humidity sensor signal correction. The sensor responds to changes in altitude and atmospheric conditions and gives the Engine Control Module (ECM) an indication of intake air pressure relative to humidity. The ECM provides a 5 V reference and signal circuits to the TCIAP which shares a low reference circuit with IAT 1 and 2. Ignition voltage and ground circuits are also supplied to the Multifunction Intake Air Sensor internal circuits for these sensors:
- Intake Air Temperature (IAT) Sensor 1
- IAT Sensor 2
- Humidity Sensor
- Mass Air Flow (MAF) Sensor
- Turbocharger Inlet Air Pressure (TCIAP) Sensor (BARO 2)
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the BARO sensor pressure is less than 44 kPa (6.4 PSI) for greater than 5 s.

OBDII Code P227C 2014 GMC Sierra - Barometric Pressure Sensor 2 Circuit Low Voltage - AutoCodes.com — P227C 2014 GMC Sierra Code - Barometric Pressure Sensor 2 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P227C 2014 GMC Sierra?

Faulty Multifunction Intake Air Sensor
Multifunction Intake Air Sensor harness is open or shorted
Multifunction Intake Air Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P227C 2014 GMC Sierra?

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 P227C 2014 GMC Sierra 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 P227C 2014 GMC Sierra 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 P227C 2014 GMC Sierra Code

1. What does the OBDII code P227C on a 2014 GMC Sierra mean?

The code P227C indicates a low voltage condition in Barometric Pressure Sensor 2 Circuit.

2. What are the common symptoms of a P227C code in a 2014 GMC Sierra?

Common symptoms include decreased engine performance, rough idling, poor fuel economy, and the illumination of the Check Engine Light.

3. What are the potential causes of the P227C code in a 2014 GMC Sierra?

Possible causes may include a faulty barometric pressure sensor, damaged wiring or connectors, a vacuum leak, or issues with the engine control module.

4. How can I diagnose the P227C code in my 2014 GMC Sierra?

Diagnosing the P227C code typically involves using an OBDII scanner to read the code, inspecting the barometric pressure sensor and its wiring, checking for vacuum leaks, and testing the sensor's voltage output.

5. Can I continue driving my 2014 GMC Sierra with a P227C code?

While it is possible to drive with a P227C code, it is not recommended as it can lead to further damage to the engine and emissions system. It is best to address the issue promptly.

6. How can I repair the P227C code in my 2014 GMC Sierra?

Repairing the P227C code may involve replacing the barometric pressure sensor, repairing or replacing damaged wiring or connectors, fixing any vacuum leaks, or reprogramming the engine control module.

7. Is it safe to reset the Check Engine Light after fixing the P227C code in my 2014 GMC Sierra?

Yes, once the issue causing the P227C code has been resolved, it is safe to reset the Check Engine Light using an OBDII scanner to clear the code.

8. How much does it cost to fix the P227C code in a 2014 GMC Sierra?

The cost of fixing a P227C code can vary depending on the specific cause of the issue, the labor rates in your area, and whether you choose to repair the vehicle yourself or take it to a mechanic.

9. Can a DIY enthusiast repair the P227C code in a 2014 GMC Sierra?

Depending on your skills and experience, you may be able to repair the P227C code yourself by following diagnostic procedures, replacing components, and clearing the code with an OBDII scanner.

10. How often does the P227C code occur in a 2014 GMC Sierra?

The occurrence of the P227C code can vary depending on the vehicle's maintenance history, driving conditions, and other factors. If the code appears, it should be addressed promptly to prevent further issues.