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P222F OBD2: Barometric Pressure Sensor "A"/"B" Correlation

P222F OBD2: Barometric Pressure Sensor “A”/”B” Correlation

The P222F OBD-II code indicates a problem with the Barometric Pressure Sensor, which is critical for maintaining optimal engine performance. This code signals that the readings between the Barometric Pressure Sensor “A” and “B” are not in correlation, leading to various issues.

What Does the P222F Code Mean?

The P222F code refers to a correlation issue between two barometric pressure sensors or between the sensor and the PCM (Powertrain Control Module). When the PCM detects that the sensor’s calibration is off or that its voltage reading is incorrect, it triggers this code. This could be due to sensor malfunction or other related issues.

What Causes the P222F Code?

Several factors can trigger the P222F code, including:

  • Clogged air filter
  • Mass Air Flow (MAF) sensor failure
  • Powertrain Control Module (PCM) failure
  • Outdated PCM software
  • Wiring issues

What Are the Symptoms of the P222F Code?

Drivers may experience several symptoms when the P222F code is present:

  • Decreased engine performance
  • Increased fuel consumption

How Serious Is the P222F Code?

The P222F code is categorized as urgent. It indicates significant malfunctions that can lead to severe damage to the vehicle or pose risks to the driver and passengers. Immediate attention is warranted to prevent further complications.

How to Diagnose the P222F Code

To accurately diagnose the P222F code, follow these steps:

  1. Use an OBD-II scanner to retrieve the code and any other related codes.
  2. Inspect the Barometric Pressure Sensor and its wiring for any visible damage.
  3. Check for vacuum leaks in the intake system.
  4. Test the sensor’s voltage and compare it against manufacturer specifications.
  5. Consider testing or replacing the MAF sensor if necessary.

Common Repairs for the P222F Code

Depending on the diagnostic results, common repairs may include:

  • Replacing the Mass Airflow Sensor
  • Replacing the MAP Sensor
  • Updating the PCM software
  • Repairing or replacing damaged wiring

How Much Does It Cost to Fix the P222F Code?

The cost to fix the P222F code can vary widely depending on the specific issue and the make and model of the vehicle. On average, repairs can range from $100 to $600, including parts and labor.

Can I Fix the P222F Code Myself?

While some DIY enthusiasts may be able to address minor issues, such as replacing a clogged air filter or inspecting wiring, it is generally recommended to consult a professional for diagnosing and fixing the P222F code. Proper diagnosis is crucial to avoid unnecessary repairs and to ensure that all underlying issues are addressed.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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