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P2228 Subaru Code - Barometric Pressure Sensor Circuit Low Voltage

Quick Answer

The P2228 diagnostic trouble code (DTC) for Subaru vehicles indicates a problem with the Barometric Pressure Sensor Circuit registering low voltage. Common causes include Faulty Barometric Pressure Sensor, Damaged wiring or connectors in the sensor circuit, Malfunctioning ECM. 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 Faulty Barometric Pressure Sensor, Damaged wiring or connectors in the sensor circuit, Malfunctioning ECM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P2228 Subaru Description

The P2228 diagnostic trouble code (DTC) for Subaru vehicles indicates a problem with the Barometric Pressure Sensor Circuit registering low voltage. The Barometric Pressure Sensor is responsible for monitoring the atmospheric pressure outside the vehicle, which is crucial for the engine management system to adjust air-fuel mixture and ignition timing. When the sensor detects low voltage, it can lead to incorrect fuel delivery and ignition timing, resulting in poor engine performance, reduced fuel efficiency, and increased emissions.

OBDII Code P2228 Subaru - Barometric Pressure Sensor Circuit Low Voltage
P2228 Subaru Code - Barometric Pressure Sensor Circuit Low Voltage

Common Causes of P2228 Subaru

  1. Faulty Barometric Pressure Sensor
  2. Damaged wiring or connectors in the sensor circuit
  3. Malfunctioning ECM
  4. Vacuum leaks in the intake system
  5. Issues with the air intake system

Symptoms of P2228 Subaru

  1. Rough idling
  2. Stalling
  3. Hesitation during acceleration
  4. Reduced power
  5. Poor fuel efficiency

How to Fix P2228 Subaru

  1. Connect a diagnostic scanner to the vehicle's onboard computer to retrieve the DTC and confirm the P2228 code.
  2. Inspect the Barometric Pressure Sensor and its wiring for any visible damage or corrosion. Replace the sensor if necessary.
  3. Check the connections and wiring in the sensor circuit for any loose connections or breaks. Repair or replace damaged wiring as needed.
  4. Clear the DTC from the ECM's memory using the diagnostic scanner and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostic tests may be required to pinpoint the exact cause of the low voltage signal.

Cost to Fix P2228 Subaru

The typical repair costs for addressing a P2228 Barometric Pressure Sensor Circuit Low Voltage code can vary depending on the cause of the issue and the specific components that need to be replaced. On average, the cost of replacing a Barometric Pressure Sensor can range from $100 to $200, while labor costs can add an additional $80 to $150 per hour. If additional repairs or diagnostic tests are needed, the total cost may increase accordingly. It is advisable to consult with a trusted auto repair shop for a more accurate estimate based on your specific vehicle make and model.

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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.

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