P0400 Trouble Code: Exhaust Gas Recirculation Flow Malfunction (Top Causes & DIY Fixes)

#exhaustsystem #exhaust #P0400
The P0400 is a trouble code that is logged when the powertrain control module of your vehicle detects that the EGR flow is lower than expected.
The exhaust gas recirculation (EGR) system helps reduce emissions by recirculating a portion of the exhaust gases back into the engine's combustion chamber. This lowers the combustion temperature and reduces the formation of nitrogen oxides.
In this video, we discuss the common causes of P0400 code and how to fix it.

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Chapters:
00:00 Introduction
00:53 Clogged EGR Valve or Passages
01:16 Faulty EGR Valve
01:35 EGR Solenoid Malfunction
02:00 EGR Temperature Sensor Failure
02:15 Electrical Issues
02:28 Faulty PCM
02:51 DIY Fixes

Disclaimer:
This video is for educational purposes only. We are not in the auto repair business nor publish automotive service manuals. This video is not reviewed or authorized by any vehicle manufacturer. This video is intended only as general guidance. Every system is slightly different, so refer to the owner’s manual of your vehicle for any specific information about your model. Remember that only proper service and repair procedures will ensure your car's safe and reliable operation.

Copyright Disclaimer:
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