DPF sensor A low

[Fsabrun]

Hi All
My first post here.
I have a 2010 C350 CDi.
Was intermittently losing power and
has recently gone into limp mode with EML on.
Have read code on OBD2 and it's:
P2454 DPF pressure sensor A low.

Anyone know where to find this on the car?
I've been told its not an expensive part and usually best to start here.

Any advice appreciated


Thanks

 

[onefortheroad]

Bulkhead , left side near fusebox . Towards centre of car .

 

[Fsabrun]

Thanks so much!
Found replacement on eBay.
Hopefully that should sort it

 

[Tony Dyson]

How do you know it's an instrument failure and not an out of parameter reading being generated and recorded by a working instrument?
Have you looked at live data, read and interpreted the working pressures being recorded?

 

[Fsabrun]

Hi Tony
I don't but a used genuine mb pressure sensor was only £25 on eBay.
Thought it was worth a try at that price.

 

[onefortheroad]

Hi Tony
I don't but a used genuine mb pressure sensor was only £25 on eBay.
Thought it was worth a try at that price.

New is the way forward. Tbh.

 

[Fsabrun]

True. Just couldn't see any OEM parts. Lots of aftermarket ones. There was a couple of Bosch new parts but decided to go give this used one a go first.

Is there a good site to buy genuine mercedes parts from apart from dealers?

 

[Taffy7hfa]

Grangemouth Mercedes, discounted prices if your a forum member.
I would only use genuine OEM especially where sensors are concerned, Ebay is a can of worms.

 

[onefortheroad]

True. Just couldn't see any OEM parts. Lots of aftermarket ones. There was a couple of Bosch new parts but decided to go give this used one a go first.

Is there a good site to buy genuine mercedes parts from apart from dealers?

Bosch would of been the better option. Than a used mb sensor.

 

[Tony Dyson]

Hi Tony
I don't but a used genuine mb pressure sensor was only £25 on eBay.
Thought it was worth a try at that price.

Have you considered how you would test the Pressure Differential Switch to confirm it's in good working order prior to installation?

 

[Fsabrun]

Hi guys

Just thought I'd update you all.
Actually, was quite busy so didn't see the other messages.

Cleared the code & changed the sensor.
No I'm not really sure how to test it?
Any info much appreciated.

Took it for a cruise and it's working like a charm. Hope it stays that way!

Thank you all for your help and the tip about Grangemouth discount for members.

 

[Tony Dyson]

If it's working that's testament enough it's in good working order isn't it? a good result and good to hear a success story for a change!

 

[Fsabrun]

Hi Tony

Yes it is
I did read an article later on testing the sensor with multi-meter & pressure guage but I'm glad I didn't need to do that, as don't have a pressure gauge!