AutoCodes – GMC – P227D 2017 GMC Sierra

P227D 2017 GMC Sierra Code - Barometric Pressure Sensor 2 Circuit High 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: P227D 2017 GMC Sierra indicates Barometric Pressure Sensor 2 Circuit High 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 188

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 P227D 2017 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 greater than 115 kPa (16.7 PSI) for greater than 5 s.

OBDII Code P227D 2017 GMC Sierra - Barometric Pressure Sensor 2 Circuit High Voltage - AutoCodes.com — P227D 2017 GMC Sierra Code - Barometric Pressure Sensor 2 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P227D 2017 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 P227D 2017 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 P227D 2017 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.

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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 P227D 2017 GMC Sierra Code

1. What does the OBDII code P227D mean on a 2017 GMC Sierra?

P227D indicates that the Barometric Pressure Sensor 2 is detecting a voltage higher than expected, which may suggest an issue with the sensor or its circuit.

2. What are the common symptoms of the P227D code on a 2017 GMC Sierra?

Symptoms may include reduced engine performance, poor fuel economy, difficulty starting, or the Check Engine Light being illuminated.

3. What causes the P227D code to appear in a 2017 GMC Sierra?

Common causes include a faulty barometric pressure sensor, damaged wiring or connectors, a short or open circuit in the sensor circuit, or an issue with the vehicle's PCM.

4. Can a dirty air filter cause the P227D code on a 2017 GMC Sierra?

While a dirty air filter can indirectly affect air pressure readings, it is unlikely to directly cause the P227D code. The issue is typically electrical or sensor-related.

5. How do you diagnose the P227D code on a 2017 GMC Sierra?

Diagnosis involves inspecting the barometric pressure sensor and its wiring for damage, testing the sensor with a multimeter, and using a scan tool to compare barometric readings with other sensors.

6. Can I still drive my 2017 GMC Sierra with the P227D code?

While the vehicle may still be drivable, it is not recommended to ignore this issue, as it can lead to poor performance and potential engine damage if unresolved.

7. How do you fix the P227D code on a 2017 GMC Sierra?

Repairs may include replacing the barometric pressure sensor, repairing damaged wiring or connectors, or, in rare cases, reprogramming or replacing the PCM.

8. How much does it cost to repair the P227D code on a 2017 GMC Sierra?

Repair costs can vary widely, ranging from $50 to $300 for sensor or wiring repairs, and higher if reprogramming or PCM replacement is needed.

9. Can a faulty PCM cause the P227D code on a 2017 GMC Sierra?

Yes, though it is rare. A malfunctioning PCM could cause incorrect voltage readings or misinterpret data from the barometric pressure sensor.

10. Is the P227D code related to weather or altitude changes?

Not directly. While the barometric pressure sensor monitors atmospheric pressure, the code is triggered by electrical issues such as high voltage, unrelated to natural pressure variations.