AutoCodes – GMC – P227C 2016 GMC Sierra

P227C 2016 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 2016 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 175

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 Oct 01, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P227C 2016 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 2016 GMC Sierra - Barometric Pressure Sensor 2 Circuit Low Voltage - AutoCodes.com — P227C 2016 GMC Sierra Code - Barometric Pressure Sensor 2 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P227C 2016 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 2016 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 2016 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 2016 GMC Sierra 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 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P227C on a 2016 GMC Sierra?

- Common symptoms include poor engine performance, reduced fuel efficiency, and illuminated Check Engine Light.

2. What does the OBDII code P227C indicate on a 2016 GMC Sierra?

- OBDII code P227C indicates a low voltage condition in the Barometric Pressure Sensor 2 circuit of the vehicle.

3. What are the possible causes of OBDII code P227C on a 2016 GMC Sierra?

- Possible causes include a faulty barometric pressure sensor, damaged wiring or connectors, low battery voltage, or a problem with the engine control module.

4. How can I diagnose the issue causing OBDII code P227C on my 2016 GMC Sierra?

- Diagnosis involves inspecting the barometric pressure sensor and its wiring, testing for voltage at the sensor, and checking for any other related faults in the system.

5. Can I drive my 2016 GMC Sierra with OBDII code P227C?

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

6. How can I repair OBDII code P227C on my 2016 GMC Sierra?

- Repair options include replacing the barometric pressure sensor, repairing or replacing damaged wiring, addressing any battery voltage issues, or reprogramming the engine control module.

7. Is it safe to reset the Check Engine Light after fixing OBDII code P227C on a 2016 GMC Sierra?

- Yes, once the underlying issue causing the code is fixed, it is safe to reset the Check Engine Light using an OBDII scanner.

8. How much does it cost to repair OBDII code P227C on a 2016 GMC Sierra?

- The cost of repair can vary depending on the exact cause of the code, but it may involve parts and labor expenses ranging from $100 to $500 or more.

9. Can a DIY enthusiast fix OBDII code P227C on a 2016 GMC Sierra?

- While some experienced DIY enthusiasts may be able to diagnose and repair this code, it is recommended to seek professional help due to the complexity of the system.

10. How can I prevent OBDII code P227C from reoccurring on my 2016 GMC Sierra?

- To prevent the code from reoccurring, it is important to follow regular maintenance schedules, address any underlying issues promptly, and ensure the vehicle is in good running condition.