P20E8 – Reductant Pressure Too Low

 

P20E8: DIY Repairing Video Tutorial

https://youtu.be/bbRamGRHGFI

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

 

P20E8 Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light)  

P20E8 Possible Causes

  Damaged reductant pump,Damaged reductant injector,Damaged reductant purge valve,Damaged reductant pressure line,Damaged reductant pressure sensor  

P20E8 Description

  The Powertrain Control Module (PCM) monitors reductant pressure as the system primes for injection. The Aftertreatment DEF pump has internal diagnostics which evaluate whether the DEF pump is able to meet its demand. If the pump reports insufficient performance for more than a threshold time then the P20E8 code is set.