P2228 Fault Code

Barometric Pressure Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

P2228 fault code indicates that the barometric pressure circuit is registering a low voltage or signal. This code is associated with the vehicle's engine management system and can affect how the engine receives information on air density, which is crucial for proper fuel metering and ignition control.

• Barometric pressure sensors help the engine control unit (ECU) calculate the air density based on atmospheric pressure.
• A reading that is too low may suggest a malfunctioning sensor, damaged wiring, or issues in the circuit.
• The vehicle may exhibit performance issues as a result of this code being triggered.

What are the symptoms of the P2228 code?

Drivers may experience several symptoms when the P2228 code is triggered:

• Decreased engine performance or power loss.
• Difficulty starting the engine, particularly in high-altitude areas.
• Check Engine Light (CEL) illuminated on the dashboard.
• Possible rough idling or stalling of the engine due to improper air-fuel mixture.

What causes the P2228 code?

Common causes of the P2228 code include:

• Faulty barometric pressure sensor.
• Damaged or corroded wiring or connectors in the barometric pressure sensor circuit.
• Issues with the engine control module (ECM) or its programming.
• Vacuum leaks that could affect pressure readings.
• Short circuits or open circuits in the wiring harness.

How to fix P2228?

To resolve the P2228 fault code, consider the following steps:

1. Inspect the barometric pressure sensor and replace it if faulty.
2. Check the electrical connections and wiring for any signs of damage or corrosion.
3. Test the circuit with a multimeter to confirm proper voltage and ground signals.
4. Clear the code with an OBD-II scanner and perform a test drive to see if it returns.
5. If issues persist, further investigate the ECM for potential faults or programming issues.