dpf problem

bigandyloan

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Hi guys. i have a 04 C220cdi i had the car parked up for a few months an now the car wont go over 3000rpm or wont exceed 30mph. i gave the RAC a call the patrol plugged his laptop in and came up a fault code diesel particulate filter. Any you guys experienced this problem before?
 

Cole@MBS

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124 300 CE 24 Coupe, C220CDI, 1959:Morris Minor
You need to replace the sensor bolted to the gearbox filler tube, and flash the engine control module with the later software!!

Welcome to the forums!
 
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bigandyloan

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thanks mate. would this need to be done at my local MB dealer? do you know a rough cost for this job thanks
 

Alex Crow

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W169, W124, w202, W203, KTM 250 EXC, VW T25 camper and a Polo in a pear tree
that would be the differential pressure sensor colin. are these known to cause problems then?
 

Alex Crow

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W169, W124, w202, W203, KTM 250 EXC, VW T25 camper and a Polo in a pear tree
not yet colin.

we are based in a rural location, our customers with the newer cars generally have open road running which may be good for the dpfs? also being independent we are a few years behind the dealers on most problems. sounds like only a matter of time though.
 
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bigandyloan

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guys forgot to say the car got a new garett turbo before parked up and never been good since could the dpf be blocked with oil or do you think its still the differential pressure sensor?
 

Cole@MBS

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124 300 CE 24 Coupe, C220CDI, 1959:Morris Minor
guys forgot to say the car got a new garett turbo before parked up and never been good since could the dpf be blocked with oil or do you think its still the differential pressure sensor?

Common for the sensor to be at fault, cant belive A/P hasnt seen this fault before!!
 
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bigandyloan

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colin just out of curiosity is it possible the filter is blocked?
 

Xtractorfan

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S class
Was there not a recall on some models for this sensor to be replaced SAM
 
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bigandyloan

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could you tell me where this sensor is located?
 

Alex Crow

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he did, post #2.

have you tried repeated short drives on full throttle? if it is oil contamination this could clear it, we have been through this scenario before with a failed turbo flooding the dpf with oil, all ok now.
 
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bigandyloan

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A/P tried short journeys but just seems to be no power also tried holding the revs at 3000rpm to the engines red hot still no joy. whats the best thing to do to clear the filter driving or holding the throttle to the floor?
 

Alex Crow

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well you have covered that possibility then.

sam unit says this is primarily a sensor fault, possibly agrevated by overly sensitive monitoring which can be cured with a software update. i have no doubt he is right, he the man.
 

djcheung

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Hi there,

I have a problem with my DPF where it is burning off once every 80-100 miles on a mixture of town and motoring driving.
Despite numerous trips to the dealer and parts changed - ECU, DPF, Sensors etc, the same condition persists.

The dealer now has run out of ideas.
Any thoughts?

Mine is 05' S320 CDI.

Any ideas would be much appreciated.

David.
 
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bigandyloan

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guys plugged the car in tonight. the fault codes are P0471 exhaust pressure sensor and P0299 turbo super charger underboost will this still be the differential pressure sensor?
 

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