How to Test and Replace EVAP Pressure Sensor P0450

In this video we explore how to test and replace the EVAP pressure sensor P0450. Trouble code p0450 deals with an improper voltage signal from the EVAP pressure sensor to the ECM. This could be due to a bad harness connector, the pressure sensor or the EVAP canister vent control valve. Check with your vehicle's repair manual for testing parameters. This specific vehicle is a 1997 Nissan Maxima.

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This sensor is used with a number of components in throughout the EVAP system. The EVAP control system pressure sensor is located in the purge line. The sensor detects pressure inside the purge line and modifies the voltage signal sent from the ECM. As the pressure increases the voltage rises. This sensor is used for on board diagnostics.

P0450 - An improper voltage signal from EVAP control system pressure sensor is entered into the ECM.

P0451 - Evaporative Emission Control System Pressure Sensor
P0452 - Evaporative Emission Control System Pressure Sensor Low Input
P0453 - Evaporative Emission Control System Pressure Sensor High Input

Note:
Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. Carsntoys is a member of the Amazon Influencer Program.

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