P004C – Turbocharger/Supercharger Boost Control ‘B’ Circuit Low

 

P004C: DIY Repairing Video Tutorial

https://youtu.be/81q6EjAxjqY

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

 

P004C Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light)  

P004C Possible Causes

  Faulty boost pressure/ turbocharger position sensor,Boost pressure/ turbocharger position sensor harness is open or shorted,Boost pressure/ turbocharger position sensor circuit poor electrical connection,Faulty turbocharger/supercharger  

P004C Description

  The turbocharger has nozzle vane which opens and closes to control the volume of the exhaust gas flowing into the turbine. This, in turn, controls the boost pressure, when the nozzle vane moves towards the closing direction, the pressure increases. When the vane moves towards the opening direction, the pressure decreases.