If you're talking about the aftertreatment differential, it's the black box located above the DPF.
In crankcase filter box
Egr diff sensor is behind your fuel pump on the drivers side. It has two small hoses running to the bottom of it. It looks like it is inside a cage that is the best way to explain it
Drivers side just Behind the Fuel Filter
Compromised oil system, faulty engine oil rifle pressure 1 sensor.
Compromised oil system, faulty engine oil rifle pressure 1 sensor.
Left side of the block, about 1/3 of the way up from the rear.
On the driver side of the engine behind the fuel filter on the side of the block
On a Cummins ISX engine, the fuel pressure sensor is typically located on the fuel rail or near the fuel filter assembly. It monitors the fuel pressure in the system to ensure proper fuel delivery to the injectors. Accessing it may require removing some components for better visibility and reach. Always consult the engine's service manual for specific details and location based on your engine model.
There's a plastic tab on top of the plug... slide that across the plug, then you push in the tab and pull out the connector.
Left side of the engine block, about a third of the way from the back of the engine. Disconnect the weatherpack terminal, use a 1-1/16" socket with an extension to get it out.
diesel filter you will find the two sensors, one for oil pressure and the otrher for temperatura, in the sider wher to PCM, You will need to remove the diesel filter, and the sensro are screwef in th monoblock.
Isx is 45 qts with a new filter