AutoCodes – Subaru – P2228 Subaru

P2228 Subaru Code - Barometric Pressure Sensor Circuit Low Voltage

Quick Answer

The Barometric pressure (BARO) sensor is built into the Engine Control Module (ECM) and monitors atmospheric pressure. Common causes include Engine Control Module (ECM) outdated or incorrect software, Faulty Engine Control Module. 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: P2228 Subaru indicates Barometric Pressure Sensor Circuit Low Voltage.
Common causes: Common causes include Engine Control Module (ECM) outdated or incorrect software, Faulty Engine Control Module.
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 244

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 May 23, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2228 Subaru Description

The Barometric pressure (BARO) sensor is built into the Engine Control Module (ECM) and monitors atmospheric pressure. When the throttle valve is wide open, the Manifold Absolute Pressure (MAP) sensor output is nearly equal to the BARO sensor output. If the throttle position is beyond a value stored in the ECM that is used to detect wide-open throttle, and if the difference between the MAP sensor output and the BARO sensor output is equal to or greater than a set value, a malfunction in the BARO sensor output is detected and a Diagnostic Trouble Code (DTC) is stored.

OBDII Code P2228 Subaru - Barometric Pressure Sensor Circuit Low Voltage - AutoCodes.com — P2228 Subaru Code - Barometric Pressure Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2228 Subaru?

Engine Control Module (ECM) outdated or incorrect software
Faulty Engine Control Module

How to Fix the DTC P2228 Subaru?

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 P2228 Subaru 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 P2228 Subaru Code

1. What are the common symptoms of OBDII code P2228 in a Subaru related to the Barometric Pressure Sensor Circuit Low Voltage?

The common symptoms include poor engine performance, decreased fuel efficiency, rough idling, and in some cases, the Check Engine Light may illuminate.

2. What are the possible causes of OBDII code P2228 in a Subaru?

The code P2228 in a Subaru is typically caused by a faulty barometric pressure sensor, damaged wiring or connectors in the sensor circuit, or a problem with the engine control module (ECM).

3. How can I diagnose the OBDII code P2228 in my Subaru?

Diagnosing code P2228 involves using a scan tool to read the code and then testing the barometric pressure sensor, checking the wiring and connectors for any damage, and verifying the ECM's functionality.

4. Is it safe to drive my Subaru with OBDII code P2228 present?

It is not recommended to drive your Subaru with code P2228 active, as it can lead to poor engine performance and potentially cause further damage to the vehicle.

5. Can I repair OBDII code P2228 in my Subaru myself?

Repairing code P2228 may require specialized tools and knowledge, so it is recommended to have a professional mechanic diagnose and repair the issue to ensure it is properly fixed.

6. How much does it typically cost to repair OBDII code P2228 in a Subaru?

The cost of repairing code P2228 can vary depending on the root cause of the issue. It is advisable to consult a mechanic for an accurate estimate based on your specific vehicle.

7. Can a faulty barometric pressure sensor cause other issues in my Subaru?

Yes, a faulty barometric pressure sensor can cause a range of issues beyond triggering code P2228, including affecting fuel mixture, emissions, and overall engine performance.

8. Are there any preventive measures to avoid OBDII code P2228 in a Subaru?

Regular maintenance, such as checking and cleaning the sensor and its connections, can help prevent issues like code P2228 related to the barometric pressure sensor.

9. How urgent is it to address OBDII code P2228 in a Subaru?

While the severity may vary, it is advisable to address code P2228 promptly to prevent further engine-related issues and ensure optimal vehicle performance.

10. Can resetting the Check Engine Light resolve OBDII code P2228 in a Subaru?

Resetting the Check Engine Light may temporarily clear the code, but if the underlying issue causing code P2228 is not addressed, the light is likely to come back on.