P0451 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P0451 – Evaporative Emission Control System Pressure Sensor Range/Performance

 

P0451: DIY Repairing Video Tutorial

https://youtu.be/Kj7MQbCh4UA

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

 

P0451 Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light)  

P0451 Possible Causes

  Faulty Evaporative Emission System (EVAP) Pressure Sensor,Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted,Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection,Faulty Engine Control Module (ECM)  

P0451 Description

  The Evaporative Emission System (EVAP) control system pressure sensor detects pressure in the purge line. The sensor output voltage to the Engine Control Module (ECM) increases as pressure increases. The EVAP control system pressure sensor is not used to control the engine system. It is used only for on board diagnosis.