Fuel Pressure Sensor
Thread Starter
Junior Member
Joined: Sep 2018
Posts: 39
Likes: 1
From: Bullhead City, AZ.
2000 Mercedes CLK 320 Convertable
Fuel Pressure Sensor
Where is the pressure sensor located on a 2000 CLK 320? I've already replaced the purge sensor. I got the PO450 code.
MBWorld Fanatic!
Joined: Nov 2001
Posts: 1,259
Likes: 212
From: Boston North Shore
2001 CLK320 Cabrio
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.
The P0450 malfunction occurs when an improper voltage signal is sent from the Evaporative Emission System (EVAP) control system pressure sensor to the Engine Control Module (ECM).The sensor detects pressure in the purge line and it's output voltage increases as the pressure increases.
However, the EVAP control system pressure sensor is not used to control the engine system (e.g. is used only for on-board emissions diagnostics).
I've included a diagram of the W208 fuel system that describes how the EVAP system works.
Thread Starter
Junior Member
Joined: Sep 2018
Posts: 39
Likes: 1
From: Bullhead City, AZ.
2000 Mercedes CLK 320 Convertable
AWESOME!! And Thanks! I kinda figured that it was in the filter as I had changed that and the fuel pump out already. I checked for vacuum leaks and had none. I am pretty sure I have an issue with the Purge Valve Solenoid/control.
Thanks agin for the diagram.
Thanks agin for the diagram.
Newbie
Joined: Jun 2023
Posts: 1
Likes: 0
1999 clk320
I fixed the issue with the CEL with P0450 on my 1999 CLK320. You need to change the right fuel level sensor.and it's located inside the gas tank. After changing it out, I was able to passed the California smog check after driving 200 miles.
