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Fuel Pressur Sensor on S550 W222 (Located on Tank)

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Old Feb 6, 2020 | 01:08 PM
  #1  
MaherKaldas's Avatar
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S550 4Matic 2016
Fuel Pressur Sensor on S550 W222 (Located on Tank)

Hello,

Can anyone help guide me with how to replace this Sensor ?! My car has the individual seats.
I am getting crazy readings in regards to Fuel rail pressure ( 1700+ Psi on idle ) which I think too crazy.
I had a fuel Pump that was going bad ... replaced it with a new one still getting the same readings?!
I think one of the two sensors are bad (1) The sensor on the fuel rail (2) The second Pressure sensor on the tank.

Please if anyone can advice?!
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Old Feb 6, 2020 | 01:23 PM
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The directions are in WIS. The access to the fuel pump is UNDER the REAR Right Passenger seat. you remove bottom seat cushion and then use a tool to remove fuel pump. There is numerous directions that I cannot copy. I would suggest buying WIS on Ebay and then you will have the directions.

You dont say how many miles are on the car but lets assume you have 100000 miles. The fluctuating pressure could be the fuel pump actually. I know this because my Ford van was doing the same thing with pressure fluctuations on the scan tool.........So if your around the 100000 mark you might just want to replace the whole assembly with the pump and all.

Katie
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Old Feb 6, 2020 | 02:11 PM
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Katie, Thank you for your reply ... I already replaced Fuel Pump ... Mileage is 118K
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