Limp mode problem
Thread Starter
Newbie
Joined: Aug 2011
Posts: 3
Likes: 0
mercedes c200 2.1 diesel
Limp mode problem
limp mode problem,car will only rev about 2000 rpm and then changes gear, (auto) c200 w203 2.1 diesel 2005 model, garage said it was a blocked particulate filter, I fitted new one, did not cure the problem, went back to garage, codes still say it blocked filter, any ideas ?
Last edited by laser; Aug 7, 2011 at 03:54 AM.
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,714
Likes: 56
From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
Might be worth taking a look at this :- C:\Users\john\Documents\Motor Vehicles\Mercedes\Engine\Cleaned my EGR traject; what a mess!!! - MBWorld_org Forums.htm
I wonder whether the Particulate filter Differential pressure sensor has a problem or the DP sensor lines are blocked.
Also the Cats or muffler may be blocked.
Good luck.
I wonder whether the Particulate filter Differential pressure sensor has a problem or the DP sensor lines are blocked.
Also the Cats or muffler may be blocked.
Good luck.
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,714
Likes: 56
From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
Was the car running well before it went into Limp Mode? . Any symptoms ?.
I have not seem a DPF but logic says if you disconnect the differential pressure sensing lines at the DPF the sensor should read no DP & may allow you to run. Check if there is any carbon crud in the tapping points or sensing pipes of the DPF.
I have not seem a DPF but logic says if you disconnect the differential pressure sensing lines at the DPF the sensor should read no DP & may allow you to run. Check if there is any carbon crud in the tapping points or sensing pipes of the DPF.
Thread Starter
Newbie
Joined: Aug 2011
Posts: 3
Likes: 0
mercedes c200 2.1 diesel
Carsy,
yes the car was running fine before and I didn't notice any other issues with performance. When I changed the DPF I didn't blow the lines, but they looked quite clean, at least at the end I could see, the filter I removed was a little sooty, but didn't look badly blocked, do you think taking the sensor out of circuit could upset other fuel or air flow type functions, Iv'e not yet found out what the cost of the sensor would be, but I'am thinking that if its not too pricey it may be worth changing anyway.
Regards
Laser
yes the car was running fine before and I didn't notice any other issues with performance. When I changed the DPF I didn't blow the lines, but they looked quite clean, at least at the end I could see, the filter I removed was a little sooty, but didn't look badly blocked, do you think taking the sensor out of circuit could upset other fuel or air flow type functions, Iv'e not yet found out what the cost of the sensor would be, but I'am thinking that if its not too pricey it may be worth changing anyway.
Regards
Laser
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,714
Likes: 56
From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
Laser,
Taking the DPF sensor out may affect the combustion settings but just disconnecting the tapping points should give zero DP & may clear the fault.
. I have no experience in this aspect of control. My car is free of it.
I suggest you you put a post in the "DIESEL" section of this forum . There are some knowledgeable & experienced blokes there.
Let us know how you go. I am interested.
Taking the DPF sensor out may affect the combustion settings but just disconnecting the tapping points should give zero DP & may clear the fault.
. I have no experience in this aspect of control. My car is free of it.
I suggest you you put a post in the "DIESEL" section of this forum . There are some knowledgeable & experienced blokes there.
Let us know how you go. I am interested.
