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Dpf sensor?

Pasio1118

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Joined
Dec 14, 2024
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22
Location
Manchester uk
Car
Mercedes Benz e350 sport coupe V6 om642
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My e350 3.0 om642 started to display engine management light. After checking on obd the dpf sensor is faulty..This car is pretty much on motorway every day or each time I use it. And twice a week a make sure car is travelling 15 minutes on 2500 rpm twice a week.Sometimes I go local short distance and this is when that light comes on. Only short distance and light is on. Motorway fine. Is that sound familiar to any one. Is that dpf filter most likely full or sensor 🤔
 
It can be either , but most likely,it'll be the sensor or it's pipework. Live data for the dpf sensor is + or - 0.004 . Or as close to zero as possible.
 
Which sensor? IIRC there are three - a pressure sensor, and temperature sensors before & after the DPF. Two of those have failed on our OM642 Vito over the years.
 
Which sensor? IIRC there are three - a pressure sensor, and temperature sensors before & after the DPF. Two of those have failed on our OM642 Vito over the years.
Not sure I will check this next time. Thanks for clue
 
As an aside the temperature sensor that went on mine was seized and had to be drilled out - apparently this is quite common.
 
Which sensor? IIRC there are three - a pressure sensor, and temperature sensors before & after the DPF. Two of those have failed on our OM642 Vito over the years.
 

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Which sensor? IIRC there are three - a pressure sensor, and temperature sensors before & after the DPF. Two of those have failed on our OM642 Vito over the years.
 

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Looks like pressure sensor. I watched some YouTube videos and should be able to do it myself
 
I didn't check that at all. Next time light pop up I will look for that. Thank you
 

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The pressure sensor was the first to go on ours - it failed at 64k miles. However it put it into limp mode, which isn't what you're getting??
 
So I replaced sensor. And have few shorts drives around the block. No check engine management light or limp mode. Hopefully this problem is sorted. It's very easy to replace sensor ... however taking sensor off the rubber hoses was a nightmare. I must of spent 25 minutes alone trying to get it off. Other than that it was easy and I learned how to replace air filters 😀 Thank you all
 
So I replaced sensor. And have few shorts drives around the block. No check engine management light or limp mode. Hopefully this problem is sorted. It's very easy to replace sensor ... however taking sensor off the rubber hoses was a nightmare. I must of spent 25 minutes alone trying to get it off. Other than that it was easy and I learned how to replace air filters 😀 Thank you all

It's easier to take off the sensor with the pipes attached and split later . 👍👍
 
It's easier to take off the sensor with the pipes attached and split later . 👍👍
But those pipes are connected to something underneath I have no idea how to take it off with pipes
 
But those pipes are connected to something underneath I have no idea how to take it off with pipes
oh well nevermind, it's fixed now 👍
 
I am curious ha. I am really novice in repairs to the cars myself but thanks to this forum I did few repairs and saved money.
When I did my c250 the rubber hoses were about 6 inches long , and it was easier just to unclip from the brass pipes ,rather than the sensor . Plus you can clean out those rubber pipes also. If you view the EPC at partsouq using your vin , you get a better image of what's what ...
 
When I did my c250 the rubber hoses were about 6 inches long , and it was easier just to unclip from the brass pipes ,rather than the sensor . Plus you can clean out those rubber pipes also. If you view the EPC at partsouq using your vin , you get a better image of what's what ...
It did look what's on the other end and I wouldn't be able to reach so just learned the hard way. Small flat screwdriver did the job eventually. Maybe if I poured hot water on pipes it would decompress rubber?
 

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