AutoCodes – Generic – P227E

P227E 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 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 1,534

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 P227E 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 - Barometric Pressure Sensor 2 Circuit Erratic - AutoCodes.com — P227E Code - Barometric Pressure Sensor 2 Circuit Erratic

What does this mean?

What are the Possible Causes of the DTC P227E?

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?

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 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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Information for Specific Makes

P227E Buick — Barometric Pressure Sensor 2 Circuit Erratic
P227E Cadillac — Barometric Pressure Sensor 2 Circuit Erratic
P227E Chevrolet — Barometric Pressure Sensor 2 Circuit Erratic
P227E GMC — Barometric Pressure Sensor 2 Circuit Erratic

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 Code

1. What are the common symptoms of OBDII code P227E (Barometric Pressure Sensor 2 Circuit Erratic)?

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

2. What are the possible causes of OBDII code P227E?

- The code P227E can be triggered by issues with the barometric pressure sensor itself, wiring or connector problems, or issues related to the engine control module (ECM).

3. How can I diagnose the cause of OBDII code P227E?

- Diagnosing P227E typically involves checking the barometric pressure sensor's wiring and connectors for damage, testing the sensor's functionality, and inspecting the ECM for any faults.

4. What can I do to repair OBDII code P227E?

- Repairing P227E may involve replacing the faulty barometric pressure sensor, repairing damaged wiring or connectors, or reprogramming the ECM to rectify any issues.

5. Is it safe to continue driving with OBDII code P227E present?

- It is generally not recommended to continue driving with code P227E present, as it can lead to further damage to the engine and negatively impact the vehicle's performance.

6. Can a DIY enthusiast fix OBDII code P227E at home?

- DIY enthusiasts with knowledge of automotive repair may be able to address P227E by following repair guides or tutorials, but it is advisable to consult a professional mechanic for accurate diagnosis and repair.

7. Are there any preventive measures to avoid OBDII code P227E in the future?

- Regular maintenance of the vehicle, including checking and cleaning the barometric pressure sensor, can help prevent issues that may trigger code P227E.

8. How long does it typically take to repair OBDII code P227E?

- The time required to repair P227E can vary depending on the exact cause of the issue, but it may take a few hours to a full day for a skilled mechanic to diagnose and fix the problem.

9. Can resetting the Check Engine Light resolve OBDII code P227E?

- Simply resetting the Check Engine Light without addressing the underlying issue will not permanently resolve code P227E. It is crucial to diagnose and fix the root cause of the problem.

10. Will OBDII code P227E cause the vehicle to fail an emissions test?

- Yes, code P227E can cause a vehicle to fail an emissions test due to the impact on engine performance and emissions control systems. It is recommended to address the issue before undergoing an emissions test.