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Bad boost pressure system

Controls turbocharger boost pressure for better engine performance.

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Costs

Every car issue can be caused by different things. Here are the most common ones

Moderate costs

max.

Potential Causes

  • Spare parts
  • Work time
Moderate costs

max.

Potential Causes

  • Spare parts
  • Work time
Moderate costs

max.

Potential Causes

  • Spare parts
  • Work time
Moderate costs

max.

Potential Causes

  • Spare parts
  • Work time
Cheapest case

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Potential Causes

  • Spare parts
  • Work time

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Discussions

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Details

Probability

Based on the values and symptoms you have entered, a crude estimation of the probability of this problem can be made

high-probability

HIGH

Typical consequences

If this defect is detected, it may lead to the following problems:

  • Engine damage
  • Failure of the exhaust emission test (Failure to pass the exhaust emission test)

Function of boost pressure control

The boost pressure control on turbochargers in diesel engines controls the amount of air entering the engine. Influenced by engine speed, intercooler, turbocharger size and intake system design, it uses boost pressure sensors, engine control unit and often a VTG turbocharger. It continuously sets the appropriate boost pressure, with the engine control unit controlling or regulating boost pressure as needed.

When using a VTG turbocharger, rotatable guide vanes are installed around the turbine wheel to modify the driving force of the exhaust gas. An electric boost pressure regulator, permanently mounted on the turbocharger, actuates these vanes to achieve the desired boost pressure.

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