Exhaust DPF pressure sensor

[Ian_Mack]

Hi all,

Newbee here. Apologies that my first post is a question but my experience of my first Mercedes has not been a good one to date (only got it at the beginning of April)

I have an ML 350 (w164) 2010 plate on 67K miles and I’m continually having dpf issues (frequency failure, code P2459)

In the past few weeks it has had a new PCV, new MAF, gearbox service, air filters, fuel filter and nothing has fixed it.

I’m now advised that it may be the Exhaust DPF pressure sensor. My question is, does a new DPF pressure sensor need to be coded to the car or can I just replace it.

Many thanks in advance,

A very frustrated Ian

 

[LostKiwi]

I'm presuming you mean Differential pressure sensor. Straight swap. No coding necessary.
Bosch one is under £30 on Amazon.

 

[Blobcat]

I'm presuming you mean Differential pressure sensor. Straight swap. No coding necessary.
Bosch one is under £30 on Amazon.

Amazon is well known for fake parts - especially Bosch so I'd find somewhere more reputable

 

[LostKiwi]

Amazon is well known for fake parts - especially Bosch so I'd find somewhere more reputable

£34.33 from the Bosch Store on Amazon.
.

 

[onefortheroad]

It will need adapting and error codes cleared . It may work out of the box if your lucky.

Why was all that replaced in connection? Guessing ...

There is an exhaust back pressure sensor fitted near the turbo/egr . Another common part that fails .

 

[ajlsl600]

Any benz(and maybe others) is a common failure.
Here on the mine, near 75% of downtime is electronic, electrical related. Egr blanking on the 65 and 85 tonne excavators has reduced down time a great deal (sorry Alistair) I can't have these excavators stood because of emissions kit failure. And even DHL is, due to in country customs, often a 3/5 week fiasco
When I last rebuild the issuzu 6wg 1 motors I replaced every sensor, switch on it. Hitachi and cat seem to have a 1 in 6 sensor, switch failure from new!!! And just two days ago I had to replace a throttle position switch on 966 that was only fitted, new, 4 weeks ago.. This failure had to be by passed . For the machine to work. (no gear shift) a headache given trans just rebuilt, it's fine now.
If that's not enough I had to use a resistor in harness plug to get oil temps on trans in range berore Cat ET would allow me to do trans clutches refill calibrations. So it ain't just mb , Hitachi and Toyota involve buying the whole common rail assly., to get the pressure switch!! I think, memory based, that cost £600, similar to mb adblue tanks to get sensor.
In last 8 yr I have been forced to learn a lot about all this stuff and nu one is, how to bypass it to keep kit moving and nu 2 is that most of it is produced to a crxp std and costs a fortune...