2012 C250 limp mode

Paston

New Member
Joined
Mar 14, 2018
Messages
7
Reaction score
0
Your Mercedes
2012 C250 AMG sport plus
Can anyone help me c250 limp mode but no engine management light when plugged in getting no current fault codes but pending codes p0236 and p0402 car had been to a indiependant and was diagnosed as faulty egr so just had new egr and throttle actuator cleaned with all new gaskets and also two new transducers. was fine driving home but since restarting still coming back with the same codes. Tia
 

John Laidlaw

Senior Member
Joined
Nov 15, 2013
Messages
26,377
Reaction score
9,034
Location
Wirral
Your Mercedes
BMW 530d X Drive Tourer M Sports
Weren’t the codes cleared when the repairs were done? They’ll still be stored until cleared
 
OP
P

Paston

New Member
Joined
Mar 14, 2018
Messages
7
Reaction score
0
Your Mercedes
2012 C250 AMG sport plus
  • Thread Starter
  • Thread starter
  • #3
They were cleared as car drove fine but since driving home and being parked up for a hour then going back out the car was in limo but no engine light so plugged in and it has pending codes? Could a blocked dpf cause this as they said that the reading were high but they took the car for a run and it had
Done a regen 10 miles previous to me collecting
 

John Laidlaw

Senior Member
Joined
Nov 15, 2013
Messages
26,377
Reaction score
9,034
Location
Wirral
Your Mercedes
BMW 530d X Drive Tourer M Sports
Could be that, have you given it a nice, old fashioned Italian tune up? (When not in limp of course)
 
OP
P

Paston

New Member
Joined
Mar 14, 2018
Messages
7
Reaction score
0
Your Mercedes
2012 C250 AMG sport plus
  • Thread Starter
  • Thread starter
  • #5
I’ve dropped it back to the garage that worked on it but what’s annoying me is it’s had £600 worth or parts and labour that’s been done through warranty and not the slightest bit different to when it first went there and obviously the problem is something else, not sure where I stand with the warranty as the work done hasn’t cured the car
 

LostKiwi

Senior Member
Joined
Aug 25, 2006
Messages
26,419
Reaction score
15,863
Location
Midlands / Charente-Maritime
Your Mercedes
'93 500SL-32, '01 W210 Estate E240, 02 R230 SL500 (Malcolm Spec), 04 Smart Roadster Coupe
If its dropping into Limp mode it must have a current code set. Likewise limp mode will always trigger a check engine light.

Whan you say Independent is it an MB independent specialist or a local garage?
 
OP
P

Paston

New Member
Joined
Mar 14, 2018
Messages
7
Reaction score
0
Your Mercedes
2012 C250 AMG sport plus
  • Thread Starter
  • Thread starter
  • #7
Thing is it’s not bringing the engine light on and obv I only have a cheap diagnostic tool so doesn’t give full codes and yes it’s a idependant Mercedes specialist and all the reviews I’ve seen are good that’s why I took it too them
 
OP
P

Paston

New Member
Joined
Mar 14, 2018
Messages
7
Reaction score
0
Your Mercedes
2012 C250 AMG sport plus
  • Thread Starter
  • Thread starter
  • #8
The codes I’ve had on different times are attached in photos
 

Attachments

  • 5B2EC01A-1782-42CF-9143-C20F835293CB.jpeg
    5B2EC01A-1782-42CF-9143-C20F835293CB.jpeg
    564.5 KB · Views: 17
  • 02ABD72B-DB4B-49D4-AEC5-E26E8DA4359E.jpeg
    02ABD72B-DB4B-49D4-AEC5-E26E8DA4359E.jpeg
    401.1 KB · Views: 15
  • 5596F21B-7BBB-482A-960C-4DED0168CCB9.jpeg
    5596F21B-7BBB-482A-960C-4DED0168CCB9.jpeg
    334.3 KB · Views: 16

Steve@Avantgarde

Forum Supporter
Authorised Forum Supporter
Joined
Dec 8, 2009
Messages
7,017
Reaction score
1,286
Location
Bristol/Somerset
Website
www.avantgarde-automotive.co.uk
Your Mercedes
C220CDI AMG Line Premium, SLR McLaren Roadster, SL55 & C32AMG
Probably a snapped inlet manifold bolt causing a loss of boost pressure, which is getting all the more common. That fault will throw up faults for the EGR system. Ideally you want a charge pressure test and then a smoke test to determine if it has an air leak.

I am surprised an Indie has missed this, with STAR you can test the EGR for opening and close.
 
OP
P

Paston

New Member
Joined
Mar 14, 2018
Messages
7
Reaction score
0
Your Mercedes
2012 C250 AMG sport plus
  • Thread Starter
  • Thread starter
  • #10
Thank you Steve for your opinion just had a call from the garage and they have been test driving it the last two days and can’t get it to go into limp like it was with me, it wouldn’t put the light on but go into limp and bring up p0402 90% of the time but in pending codes. Obviously the work they’ve done hasn’t made a change to the problem
 
OP
P

Paston

New Member
Joined
Mar 14, 2018
Messages
7
Reaction score
0
Your Mercedes
2012 C250 AMG sport plus
  • Thread Starter
  • Thread starter
  • #11
Got the car back now and all seems well so far, apparently swapped the boost pressure sensor with one they had and it been good since make you wonder why I had new egr and work done fingers crossed that’s it now
 

WE HAVE NOW MOVED: 8 Hazel Road, Woolston, SO19 7GB
Service, Repairs and remapping service
Any queries, please do not hesitate to contactEmail@mbsofsouthampton.co.ukor alternatively you can phone Colin or Dave on 02380 445820, out of hours numbers are 07787913313 or 07907631681.
Top Bottom