What is a Turbocharger Boost Sensor?
Turbocharged engines use air pressure created by the turbocharger to force air into the engine through the intake manifold. The amount of pressure that even a small turbocharger makes can exceed the factory specifications for intake pressure, so a component to monitor the amount of pressure in the system is needed. This is typically the boost pressure sensor, through a manifold absolute pressure sensor may be used instead or in addition.
How do Turbocharger Boost Sensors work?
When the turbocharger wastegate is closed, and there are no leaks in the system, the boost pressure solenoid will see a rise in boost pressure in the system, and this will be signalled to the engine control module (ECM) for further action. The same occurs for underboost conditions, and the ECM will work to correct the issue in the direction needed. This may be done by closing the wastegate, opening the wastegate, or alerting the driver there is an issue with the check engine light.
What are the symptoms of a bad Turbocharger Boost Sensor?
High or low engine power are common side effects of a failed boost pressure sensor. If the boost pressure sensor reports erroneously low boost pressure, the wastegate will close, high pressure will be introduced, and lean running conditions may be present. At higher engine speeds, this may result in lean running conditions. The opposite is true if the boost pressure sensor reports high boost pressures. The engine will lock power, and rch running conditions may be present. In all cases, the check engine light will illuminate and the ECM will store OBD codes related to these conditions.
Can I drive with a bad Turbocharger Boost Sensor?
The boost pressure sensor is yet another example of a sensor that can set the check engine light, and should not be ignored due to possible damage to the engine. Like any other time the check engine light is illuminated, the vehicle should be inspected and repaired immediately. Driving with a bad boost pressure solenoid can also lead to driveability issues, and these will further indicate that repair is needed.