AutoCodes – GMC – P227E 2015 GMC Sierra

P227E 2015 GMC Sierra Code - Barometric Pressure Sensor 2 Circuit Erratic

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
P227E 2015 GMC Sierra indicates Barometric Pressure Sensor 2 Circuit Erratic.
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 140
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Oct 01, 2022
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Code P227E 2015 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 signal had an accumulated variation, over a 10 s sample period, of greater than 100 kPa (14.5 PSI).
OBDII Code P227E 2015 GMC Sierra - Barometric Pressure Sensor 2 Circuit Erratic - AutoCodes.com
P227E 2015 GMC Sierra Code - Barometric Pressure Sensor 2 Circuit Erratic

What are the Possible Causes of the DTC P227E 2015 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 P227E 2015 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 P227E 2015 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 P227E 2015 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 P227E 2015 GMC Sierra Code

1. What does the OBDII code P227E on a 2015 GMC Sierra indicate?

The code P227E indicates a Barometric Pressure Sensor 2 Circuit Erratic issue on a 2015 GMC Sierra.

2. What are common symptoms of the P227E code in a 2015 GMC Sierra?

Common symptoms of the P227E code may include rough idling, reduced engine performance, decreased fuel efficiency, and in some cases, the check engine light may illuminate.

3. What are possible causes of the P227E code in a 2015 GMC Sierra?

Possible causes of the P227E code include a faulty barometric pressure sensor, damaged wiring or connectors related to the sensor, a vacuum leak, or an issue with the engine's air intake system.

4. How can I diagnose the P227E code in a 2015 GMC Sierra?

To diagnose the P227E code, you can use an OBDII scanner to read the code and perform a visual inspection of the barometric pressure sensor and its related wiring. You may also need to test the sensor's functionality using a multimeter.

5. How can I repair the P227E code on a 2015 GMC Sierra?

Repairing the P227E code may involve replacing the barometric pressure sensor, repairing or replacing damaged wiring or connectors, fixing any vacuum leaks, or addressing issues with the air intake system.

6. Can I drive my 2015 GMC Sierra with the P227E code?

It is not recommended to drive your vehicle with the P227E code present, as it can lead to poor engine performance and potential damage. It's best to address the issue promptly to prevent further problems.

7. How much does it cost to fix the P227E code on a 2015 GMC Sierra?

The cost of fixing the P227E code can vary depending on the specific cause of the issue, the labor rates in your area, and whether you choose to repair it yourself or take it to a mechanic. Costs may range from a few hundred dollars to over a thousand.

8. Can I reset the P227E code on my 2015 GMC Sierra without fixing the underlying issue?

While you can clear the code with an OBDII scanner, the underlying issue causing the P227E code will remain unresolved. It's important to address the root cause of the problem to prevent it from reoccurring.

9. Is the P227E code a common issue in 2015 GMC Sierra vehicles?

The P227E code related to the Barometric Pressure Sensor 2 Circuit Erratic is not as common as some other OBDII codes, but it can still occur in 2015 GMC Sierra vehicles due to various factors affecting the sensor and its circuit.

10. How long does it typically take to repair the P227E code on a 2015 GMC Sierra?

The repair time for the P227E code can vary based on the specific cause of the issue, the availability of parts, and the expertise of the person performing the repair. In general, it may take a few hours to a day to diagnose and fix the problem.

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