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P0298 Code – What Does It Mean & How To Fix It

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.


Understanding the significance of Diagnostic Trouble Codes (DTC) is essential when it comes to automobile diagnostics. P0298 is one such code that you could run into. We will examine P0298 in-depth in this blog article, looking at its definition, causes, symptoms, diagnosis, and potential remedies. To proceed, let’s first determine what P0298 genuinely implies.


To comprehend P0298 fully, it’s essential to break down its meaning:

  • “P” stands for Powertrain, indicating that the issue affects the engine and transmission.

  • “0” denotes a generic code that applies to all vehicle makes and models.

  • “2” specifies that it’s a fuel and air metering and auxiliary emission control code.

  • “9” suggests that it’s a problem related to the turbocharger or supercharger system.

  • “8” represents that it’s a “Range/Performance” issue with the boost control.

In essence, P0298 tells you that there’s a performance problem within the turbocharger or supercharger system, specifically related to the control of boost levels.


Now that we’ve deciphered the code, let’s explore the common causes behind P0298:

  • Boost Control Solenoid Malfunction: A faulty boost control solenoid can lead to improper control of the turbocharger’s boost levels, triggering this code.
  • Vacuum Leaks: Leaks in the vacuum lines that manage the turbocharger can disrupt the boost control system.
  • Wastegate Issues: Problems with the wastegate, which regulates the turbocharger’s boost, can lead to P0298.
  • Faulty Sensors: This code can be caused by faulty sensors, such as the MAP (Manifold Absolute Pressure) sensor or the boost pressure sensor, sending the engine control module the wrong information.


  • P0298-related problems can show up in many different ways, including:
  • Reduced Power: The power and acceleration of your car may noticeably decline.
  • Check Engine Light: The check engine light on your dashboard turning on is the most typical sign.
  • Poor Fuel Economy: P0298 is frequently accompanied by a decline in fuel economy since the engine may not be running at its best.


It’s crucial to follow a methodical diagnostic strategy when dealing with a P0298 code:

  • Code Scan: Start by retrieving the code and learning its specifics using an OBD-II scanner.
  • Visual Inspection: Look for obvious damage or loose connections in the turbocharger and associated parts.
  • Sensor testing: Verify the accuracy of the MAP sensor, boost pressure sensor, and boost control solenoid.
  • Pressure Testing: To make sure the turbocharger is working within the prescribed range, do a boost pressure test.

Common mistakes

In the process of diagnosing and repairing P0298, some common mistakes to avoid include:

  • Neglecting to check for vacuum leaks, can be a primary cause of this code.
  • Replacing components without conducting proper testing, leads to unnecessary expenses.
  • Overlooking routine maintenance of the turbocharger system, such as cleaning or replacing air filters and inspecting hoses.

How serious is this?

Several factors, such as the origin and extent of the issue, affect the seriousness of a P0298 code. While this isn’t an emergency at the moment, failure to follow that code can lead to a reduction in performance and fuel efficiency. In addition, turbochargers may suffer more severe and costly damage over time due to their prolonged lack of maintenance.

What repairs can fix the codeS?

repair manuals

The repairs needed to address P0298 will depend on the specific cause, but common solutions include:

  • Replacing a faulty boost control solenoid.
  • Repairing or replacing damaged vacuum lines.
  • Fixing or replacing the wastegate.
  • Replacing faulty sensors.
  • Ensuring proper maintenance of the turbocharger system.

Related codes

P0298 may be accompanied by other related codes, such as:

  • P0299: “Turbocharger/Supercharger An Underboost Condition.” This code indicates that the turbocharger is not producing enough boost.
  • P0234: “Engine Overboost Condition.” This code signifies that the turbocharger is producing too much boost, which can also lead to performance issues.


P0298 is a diagnostic trouble code that indicates problems with the boost control system for turbochargers or superchargers. For this issue to be resolved successfully, it is crucial to comprehend its significance, causes, symptoms, and diagnostic procedure.

The performance of your vehicle may be maintained, and future, more serious problems can be avoided with prompt diagnosis and proper repairs. If you have a P0298 error, don’t be afraid to speak with a skilled technician for a complete analysis and solution. The performance and fuel economy of your car will appreciate it.

P0298 Code – What Does It Mean & How To Fix It