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W203 C180k MAF Errors - Be aware

Discussion in 'Engine' started by calm9076, Jun 3, 2009.

  1. calm9076

    calm9076 New Member

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    May 9, 2009
    Hi MB owners. I've just resolved a problem on my W203 coupe which might me of interest to other W203 owners. ODB Scanner was reporting the usual P0171 and msisfire codes so like most people I rushed out and brought a Bosch MAF (£230!). Replaced the MAF but still no better (rough idle and poor acceleration). I took the airbox off again today and had a good look around and found a vacuum pipe had perished under the airbox. Quick fix (i.e. cut of the perished bit and re-attached) and all is good :thumb:

    The chap at KMS told me that sell s*#t loads of W203 MAF's!!!...Well they would if the scan tools point to the MAF.

    If you want to save yourself a hefty bill and buying bits you don't need please PM me and I will give you some pointers on checking this vacuum lead.

    I suspect this will prove to me a common problem as the rubber hose sit's in a very hot and mucky location and prone to wear under these conditions.

    Pretty poor design to be honest. MB should have substituted the cable for a different material.
     
    14 people like this.
  2. daveuj

    daveuj Hardcore MB Enthusiast

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    Location:
    Derby
    Car:
    c Class sport coup'e 2002
    thanks for the info
    Dave
     
  3. sampit

    sampit New Member

    Messages:
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    May 15, 2008
    Any chance you could send me some pointers ,I have just started removing my MAF for the expensive maybe waste of money replacement same kind of problem as you rough idle and gutless performance and low mpg
    and just came across this post .got me thinking and holding back on the maf
    I also have the following fault codes

    P2029 mixture format self adapt ion fuel trim

    P2054 camshaft adjuster

    Could I be experiencing the same problems? if only i could get the bloody air box off to have a look :mad: .any clues!

    Can any one help me on any info on these fault codes

    W203 c180k coupe 02

    Thanks a Lot

    Sam
    sampit22@aol.com
     
  4. ROBB

    ROBB Hardcore MB Enthusiast

    Messages:
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    May 16, 2006
    Location:
    Coventry
    Car:
    2001 W203 C220 CDI Estate (Rare Manual!)
    replacing just the Bosch element of the maf is much cheaper than changing the whole thing - from memory mine was approx £60
     
  5. c200Kompressor

    c200Kompressor Hardcore MB Enthusiast

    Messages:
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    Jun 6, 2007
    Location:
    Portugal
    Car:
    Toyota Yaris 1.0 VVT-I and C200 kompressor
    Well i need some help! Can you tell me on my C200 kompressor (W202) the points of vacum? Thank's
     
  6. lynall

    lynall Hardcore MB Enthusiast

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    All code readers can only tell you what they see, not what caused them to see what they saw if that makes sense?



    Lynall
     
  7. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    Location:
    Horndean, Portsmouth, Hampshire, Southsea
    Car:
    C43 AMG with a 55 engine and supercharger, MK1 Caddy, S500, etc
    We do loads of these breather pipes. Very common issue.
     
  8. V RAJA

    V RAJA New Member

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    Hi sir,
    I have a similar problem on my 2004 C180K. The code that i got is P0172 and miss firing of plugs 2 & 3. I had this problem 3 weeks back and it self cleared. However just after I had her serviced with new plugs, air filters etc, the light came on again. I really appreciate your help pse.
    B regards
    Raj
     
  9. shorty

    shorty Hardcore MB Enthusiast

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    It might be worth checking the plugs at the engine ECU to see if there is any oil in the loom . This is a common fault with the 2l kompressor engines in the 210 .It is caused by oil getting in the loom at the CPS and passing through the loom to the ECU . It can cause random faults with the MAF and other engine components
     
  10. V RAJA

    V RAJA New Member

    Messages:
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    Jun 26, 2009
    calm9076
    Hi sir,
    I have a similar problem on my 2004 C180K. The code that i got is P0172 and miss firing of plugs 2 & 3. I had this problem 3 weeks back and it self cleared. However just after I had her serviced with new plugs, air filters etc, the light came on again. I really appreciate your help pse.
    B regards
    Raj
     
  11. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    Car:
    C43 AMG with a 55 engine and supercharger, MK1 Caddy, S500, etc
    The missfire maybe due to defective coils etc. You need to have it properly diagnosed really
     
  12. V RAJA

    V RAJA New Member

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    Jun 26, 2009
    I had it diagonised today and the code was P0172. The mechanic told me that the breeder hoses may be leaking. The idling is eractic but once on the move everything is fine. Could it be a problem with the vacumm hose beneath the air box. I would like to look at the hose but need some directions on how to remove the airbox and any other item to get to the hose.
    Appreciate your reply sir.
    Thks
    V Raja
     
  13. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    Location:
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    Car:
    C43 AMG with a 55 engine and supercharger, MK1 Caddy, S500, etc
    The airbox is a bit fiddly to remove. Tou need to undo two torx bolts holding it down. Remove the spring clip holding on an intake pipe at the back and then slide the box towards the back of the car.
     
  14. V RAJA

    V RAJA New Member

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    Just to clear my confusion. Can I confirm that the airbox that we are talking about is the compartment that houses the air filter.
     
  15. renault12ts

    renault12ts Hardcore MB Enthusiast

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  16. sampit

    sampit New Member

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    Well I had a right wasted weekend scratching my head trying to remove my airbox,to check the vacuum pipes very close to using a hammer on it! my patients was running thin how the bloody hell do you get the air box off a w203 c18 coupe
    the best I can do is remove the air box cover then remove the filter remove two torxs top of the MAF that connect to the airbox.
    No idea how you get to the bottom one out, I can only see one torx that may hold the airbox on and that's in a plastic tube on the the Maf housing
    is it really that difficult, can anyone help.

    sampit
     
  17. lynall

    lynall Hardcore MB Enthusiast

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    Havent a clue! but on mine its held onto the inner wing by rubber grommets and to remove you simply give it a good tug, when refitting grease the rubbers makes it easier next time.


    Lynall
     
  18. sampit

    sampit New Member

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    Thanks calm


    You have Just saved me a fortune as my vacum pipe was split clean in halve

    happy days!
     
  19. Flyer

    Flyer Hardcore MB Enthusiast

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    Hmm, any chance this would apply to a 208? Mine is suffering from poor acceleration (like none at all if I floor the accelerator, nearly got me into serious trouble when overtaking yeasterday :( ) and rough idle .... but this is only when I've tried to accelerate hard. If I'm gentle, I don't have any problems and can cruise at 80-90 OK.

    All ready to replace the MAF unless this could be a similar problem??
     
  20. philsas

    philsas New Member

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    w204
    could VRAJA say how he got on - his symptoms are exactly the same as mine !!
     

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