What is EVAP System pressure sensor?
The EVAP Pressure Sensor, also known as a Fuel Tank Pressure (FTP) Sensor is a device that measures air pressure or vacuum in the evaporative emission (EVAP) system. This sensor is typically found on top of or inside of the fuel tank. Pressure or vacuum information is used by the PCM to monitor EVAP system purge flow.
What sensors are in the EVAP system?
The ECM uses the vapor pressure sensor to detect malfunctions in the evaporative emissions (EVAP) sys- tem. This diagnostic checks the function of the VSV for EVAP and VSV for vapor pressure sensor, and the integrity of these components and the fuel tank from the standpoint of fuel vapor emissions.
Where is the EVAP control system pressure sensor located?
Locate the EVAP canister under your vehicle. It may be attached to the fuel tank or it may be separate from the fuel tank with hoses running to the fuel pump at the fuel tank. Check that the EVAP control system pressure sensor’s connector is fully seated and clipped in. Inspect the sensor connector for corrosion at the wires.
Can a check engine light show an EVAP code?
Good news for consumers with vehicles not showing any signs of a fuel leak: even if your check engine light is on and you find an EVAP code via the OBD II reading, it might be a simple fix. In other cases, however, it might not be.
How does the EVAP system check for leaks?
The EVAP system comes with a pressure sensor that regularly checks the integrity of the system. The EVAP system tests the pressure sensor from time to time to make sure there are no leaks in the system. It utilizes the sensor known as FTP (fuel tank pressure) sensor to look for leaks.
What should I do if my EVAP sensor is not working?
Wiggle test the connector at the EVAP pressure sensor. Continue monitoring the voltage on your scan tool for fluctuations. If the voltage fluctuates when you wiggle the connector, check the connector for broken or damaged pins. The connector may also be damaged inside.