Engine light, Oil contamination ?
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Junior Member
Joined: Sep 2008
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From: edmonton alberta
2002 C230 Coupe
Engine light, Oil contamination ?
so my engine light came on, on my 2002 c230 coupe. i took it to my mb dealer to get it checked and apparently, there's oil contamination in the sensor? i have never done anything to my car under the hood other then install my HID's no where near the sensor. is it possible for the senor contamination to be from the dealer when they changed my oil? which they did only 2 weeks ago? or is this a common thing for the coupe? i coudlnt find another thread on this topic if it is. if so is there a cheaper solution? or is this gonna rape my wallet either way? the 2nd problem is that im due for my B service and if i get it done in edmonton where im currently staying itll be 800 if i take it back to saskatoon my home town, itll be only 400, so of course i want to do it in saskatoon, but with that 400 km drive with this problem... is that possible even? advice anyone?
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02' C230k Sport Coupe
What are the codes that you are getting? I will assume that is something like P0130 or something like that, mine was the oil separator, not the leaking cam sensor. You could actually remove the air filter and check the previous posts on how to check if you cam sensors are leaking. At that point the oil starts traveling from the cam harness all the way to the MAF and the car starts feeling "funny". Remember, if you have oil in a sensor (any for that matter) will not ruin it completely, just clean it good and let it dry properly.
BTW, I doubt that an oil change could cause the problem. Unless they dipped the sensor in oil, which I doubt
BTW, I doubt that an oil change could cause the problem. Unless they dipped the sensor in oil, which I doubt
Thread Starter
Junior Member
Joined: Sep 2008
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From: edmonton alberta
2002 C230 Coupe
the car defiantly feels like its running rougher, and thats what the service guy said it would do. but im not sure what error it is, ill have to go back to mb on wedensday to get it checked, so from the sounds of it this is a common thing? and if it is just oil leakin into the cam sensor, a simple wipe down and some time to let it dry is all that needs to be done? not something that will rape my wallet?
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
You need to replace both front cam sensors an remove & clean the engine harness & then fit the pigtales. Search. There is a huge amount written in this regard. I'll see if I can find the best thread for you.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
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02' C230k Sport Coupe
it could be a huge problem, however is more problematic in the M271 engines. Cases has been reported for the M111 but I think affects more the M271 (i.e. coupes 2003+). There is a write-up on how to check/replace the cam sensors. If that is the case then it could be a +2k fix unless you have them "preventively" fixed.
By the way, here's the DIY.
By the way, here's the DIY.
Last edited by fanito; May 18, 2009 at 05:47 PM. Reason: added the linky
Thread Starter
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From: edmonton alberta
2002 C230 Coupe
the diy doesn't look so bad but from what I'm getting is that's it's not expensive unless it's damaged the ecu and all the other things basicly if I leave it for to long?
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Sorry - brain fade - I thought you had a 2003 - Yes you only have one sensor to replace & clean up the engine harness. Cheap to fix now - expensive mess if you leave it. There is a M111 procedure posted - let me see if I can find it.
Thread Starter
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From: edmonton alberta
2002 C230 Coupe
well the engine light lit up less then a week ago, and mbs gonna open it up for me, i guess ill ask them to clean up the harness if possible and then wait for the senor to come in.
Thread Starter
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From: edmonton alberta
2002 C230 Coupe
So it doesn't look like at all what we were discussing about. its super bad apparently from what im told by the mechanic. so it seems that that oil contamination go its way into the wire harness, caused by a leaking camhaft adjuster magnet so now the following has to be replaced. Coolant temp sensor, engine cable harness, air mass sensor, upstream 02 sensor, engine control unit, camshaft sensor, and finally the camshaft adjuster magnet. total of 5100 worth of repairs. i called my regular mechanic, and he thinks its all sounding a little excessive. either way screwed, i remember reading on the forums that oil doesn't damage the wiring, any ideas??
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Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
So it doesn't look like at all what we were discussing about. its super bad apparently from what im told by the mechanic. so it seems that that oil contamination go its way into the wire harness, caused by a leaking camhaft adjuster magnet so now the following has to be replaced. Coolant temp sensor, engine cable harness, air mass sensor, upstream 02 sensor, engine control unit, camshaft sensor, and finally the camshaft adjuster magnet. total of 5100 worth of repairs. i called my regular mechanic, and he thinks its all sounding a little excessive. either way screwed, i remember reading on the forums that oil doesn't damage the wiring, any ideas??
https://mbworld.org/forums/c-class-w...-problems.html
He had a lot more wrong than you - where there is a will there is a way. Yes I know his was a M271 - see below for M111. Change the cam sensor & clean the harness - fit pigtale. Forget the nonsense list of things to replace. Most will respond to cleaning once you have done the basics
https://mbworld.org/forums/c-class-w...sor+repacement
Thread Starter
Junior Member
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From: edmonton alberta
2002 C230 Coupe
so i took my car back to saskatoon, the mechanic found nothing of the list from except for the 02 sensor, its alot to fix but hell of a lotless then the 5000 from before, so whats the deal? why would one mercedes say all these things need to get fixed, when the mine couldnt find anything but the o2 sensor wrong?
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From: Charlotte, NC
Had: 1987 300TD, Had: 2004 C230 Sport Sedan, Have: 2014 E350 Sport, Have: 2019 S450
so i took my car back to saskatoon, the mechanic found nothing of the list from except for the 02 sensor, its alot to fix but hell of a lotless then the 5000 from before, so whats the deal? why would one mercedes say all these things need to get fixed, when the mine couldnt find anything but the o2 sensor wrong?
If the connection at the cam sensor is dry, then it is most likely a problem isolated to the O2 sensor.
If the connection at the cam sensor is oil-fouled, then it's time to consider if you want to clean the harness D-I-Y (there's a thread here from someone who's done it before), or spend the $$$ at the stealer. Keep in mind that the dealer wants to replace the ECU, O2 sensor, harness, and won't consider cleaning them - but most who have cleaned the connections report no further problems.
(Don't shortcut and clean only the oil at the connectors, because if you've got oil in the harness, it'll keep refouling things until you get it all out).
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'17 Jaguar XF
