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I've been puzzled to find the location of Manifold Pressure Sensor. I'm supposed to replace it according to mechanic, symptoms and codes 1402 and 1408. I did not find it in the front of the engine, nor the back by the PCV and EGR. Is it under the car? It's part # A0061539528 and supposed to look like this:
Last edited by Solomon T; Nov 15, 2024 at 10:53 PM.
A0061539528 is the Differential Pressure Sensor that is used to measure the difference between input and output pressure of the Diesel Particulate Filter.
I would never change any part based on a Generic Diagnose, Fault codes like "Pxxx" is named "generic" meaningless if you consider a repair. Mercedes offers Fault Codes like Pxxx-xx, more precise and very easy to interpret.
Thanks for the link. I was able to locate the sensor and replace it with another one from ebay for $13. It took forever to get here but works now. https://www.ebay.com/itm/184954263636
This is to help anyone with the same problem:
Code P1402 is gone. Car is out of limp mode.
Code P1408 is still there. I wonder if the EGR needs time to work with the new sensor before this is cleared? Or, the EGR may be having issues itself and needs repaired or replaced? At this point I don't care as long as no limp mode and fuel consumption is normal.
I also replaced the oil separator which is worth it since old hose and valve were dumping a lot of oil in the turbo and outside area.
I will come back and update this if anything related happens.
I also still have codes P0101 & P1101. Car Scan also shows O2S1 off.
Any ideas where is that sensor located? My car ha a lot of oil leak so it's not easy to dive underneath it. I try to pin point a problem and dive into the oil! That's another issue I would love to address at one point. It's hard to tell where it's coming from.
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