Check Engine Problem
Thread Starter
Junior Member
Joined: Aug 2007
Posts: 42
Likes: 0
From: Ventura, CA
05 c230
Check Engine Problem
i have an 05 c230K
recently my Check engine light came on.
I ran the codes with an OBDII reader and the error came up
Engine Running lean (bank 1)
is this a serious problem or can i still drive it till next week when i have an appt at the dealership?
Thanks for the info.
recently my Check engine light came on.
I ran the codes with an OBDII reader and the error came up
Engine Running lean (bank 1)
is this a serious problem or can i still drive it till next week when i have an appt at the dealership?
Thanks for the info.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
i have an 05 c230K
recently my Check engine light came on.
I ran the codes with an OBDII reader and the error came up
Engine Running lean (bank 1)
is this a serious problem or can i still drive it till next week when i have an appt at the dealership?
Thanks for the info.
recently my Check engine light came on.
I ran the codes with an OBDII reader and the error came up
Engine Running lean (bank 1)
is this a serious problem or can i still drive it till next week when i have an appt at the dealership?
Thanks for the info.
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From: Pasadena, CA
2002 C230K, 2013 BMW 328, 2015 BMW X5
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Super Moderator
Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Borrow or buy a 70 buck OBDII/CAN reader from Kragens and check what codes come up. It might be minor but you can do damage by ignoring it. Run too lean for too long & you can hole a piston.
Super Member
Joined: Oct 2006
Posts: 556
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From: Berlin
2018 C63s
My light has only been on since last night. I took the car by the dealer today and the tech said the error comes up as an "adaptation error" he said it was the air/fuel mixture and it may be as small as a little sensor or the whole MAF. If it's the MAF, does anybody know how much that costs? Is it something they have to do, or is it a possible DIY job?
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06 SL65 / 97 993tt /11 Suburban/ 2012 GTR (AMG è la mia Famiglia la Bestia è la mia protezione)
My light has only been on since last night. I took the car by the dealer today and the tech said the error comes up as an "adaptation error" he said it was the air/fuel mixture and it may be as small as a little sensor or the whole MAF. If it's the MAF, does anybody know how much that costs? Is it something they have to do, or is it a possible DIY job?
Super Member
Joined: May 2008
Posts: 573
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W203
Check your cam sensors, I'll bet $5 they are leaking cause running lean is one of the first indications as it fouls the connection to the O2 sensors.
There's a thread on how to check them, STF.
Its not serious that you shouldn't drive the car, yet unless you are under warranty or can DIY, the fix is pricey!
There's a thread on how to check them, STF.
Its not serious that you shouldn't drive the car, yet unless you are under warranty or can DIY, the fix is pricey!
Super Moderator
Joined: Jun 2008
Posts: 19,942
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
My light has only been on since last night. I took the car by the dealer today and the tech said the error comes up as an "adaptation error" he said it was the air/fuel mixture and it may be as small as a little sensor or the whole MAF. If it's the MAF, does anybody know how much that costs? Is it something they have to do, or is it a possible DIY job?
https://mbworld.org/forums/c-class-w203/206492-diy-m271-maf-replacement.html
Super Moderator
Joined: Jun 2008
Posts: 19,942
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Super Member
Joined: May 2008
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W203
It's a DIY. Go here
https://mbworld.org/forums/showthread.php?t=206492
https://mbworld.org/forums/showthread.php?t=206492
CHECK THOSE FIRST!
Super Member
Joined: Oct 2006
Posts: 556
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From: Berlin
2018 C63s
Thanks for all the info guys! I have the following dilemma: I recently had to replace the alternator pulley due to faulty bearings: cost me around $520. Now I have an appointment next week to get my Check Engine situation looked at. The tech guessed it was probably either the MAF or O2 sensors, but without further investigating he couldn't tell. Also, I have a Blower Regulator issue as well as a broken passenger door pull. Basically I'm guessing I'm going to end up easily paying over a $1000 for all this. (Just a ballpark) Now I ask you guys this: is it worth buying an extended warranty? I thought that problems like these would come much later down the road since I'm only 5000 miles out of warranty. Most warranties are around $3000. Any feedback would be greatly appreciated!
Super Member
Joined: May 2008
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W203
It takes 2 mins to check them, pop the hood, pop off the connector, look for oil.
Do NOT trust the tech to find this. Te techs at the dealership I go to changed my O2 sensors despite them DRIPPING oil out of the connector!
It'll save you $500 ($300 for new MAF, $100 each for O2s) which you'll need for a new engine harness ($350).
Super Moderator
Joined: Jun 2008
Posts: 19,942
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Please, for the love of god, check your cam sensors. 50K miles is about when the leak becomes a problem, and MAF/O2 sensor issues are a common misdiagnosis.
It takes 2 mins to check them, pop the hood, pop off the connector, look for oil.
Do NOT trust the tech to find this. Te techs at the dealership I go to changed my O2 sensors despite them DRIPPING oil out of the connector!
It'll save you $500 ($300 for new MAF, $100 each for O2s) which you'll need for a new engine harness ($350).
It takes 2 mins to check them, pop the hood, pop off the connector, look for oil.
Do NOT trust the tech to find this. Te techs at the dealership I go to changed my O2 sensors despite them DRIPPING oil out of the connector!
It'll save you $500 ($300 for new MAF, $100 each for O2s) which you'll need for a new engine harness ($350).
Do the pigtales
Check for oil leaks
amanonfire - calm down & people will listen!!!
Last edited by Glyn M Ruck; Nov 7, 2008 at 06:50 PM.
Super Member
Joined: Oct 2006
Posts: 556
Likes: 4
From: Berlin
2018 C63s
Oh, I just checked the price for the Cam sensors, apparently OEM is $159 and Bosch is $89 and a company called Vemo only $70
Last edited by dbvolz; Nov 8, 2008 at 10:25 AM.
Super Moderator
Joined: Jun 2008
Posts: 19,942
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Ok, so I just unplug these sensors to see if there's a leak? Thanks for the pics, at least now I know where to look. From what I understand, I would be unplugging the sensors and pluggin in the part labeled "starter line"? Don't seem to follow you. Is this something I can replace myself? Also, I still have the blower regulator problem. You guys think it makes more sense to replace the cam sensors (if they are the problem) myself and try to get an independent to change the regulator? Or just get the warranty?
Oh, I just checked the price for the Cam sensors, apparently OEM is $159 and Bosch is $89 and a company called Vemo only $70
Oh, I just checked the price for the Cam sensors, apparently OEM is $159 and Bosch is $89 and a company called Vemo only $70
Anyway - just uplug the sensors and see if everything is full of oil. It works it's way down the harness and messes with the O2 sensor readings. You can change the sensors yourself if they are leaking and attach the pigtales that Benz devised as a fix. Then if the new ones leak they mess up the pigtales & not a major piece of wiring harness. I would not do anything until you see if the sensors are leaking or not - it might be a red herring.
Once diagnosed then you can make decisions. This is all covered in detail on this forum if you search - I am however quite prepared to help if I can - no problem. Check those cam sensors.
Super Member
Joined: Oct 2006
Posts: 556
Likes: 4
From: Berlin
2018 C63s
If you are going to keep the car I would get the warrantee.
Anyway - just uplug the sensors and see if everything is full of oil. It works it's way down the harness and messes with the O2 sensor readings. You can change the sensors yourself if they are leaking and attach the pigtales that Benz devised as a fix. Then if the new ones leak they mess up the pigtales & not a major piece of wiring harness. I would not do anything until you see if the sensors are leaking or not - it might be a red herring.
Once diagnosed then you can make decisions. This is all covered in detail on this forum if you search - I am however quite prepared to help if I can - no problem. Check those cam sensors.
Anyway - just uplug the sensors and see if everything is full of oil. It works it's way down the harness and messes with the O2 sensor readings. You can change the sensors yourself if they are leaking and attach the pigtales that Benz devised as a fix. Then if the new ones leak they mess up the pigtales & not a major piece of wiring harness. I would not do anything until you see if the sensors are leaking or not - it might be a red herring.
Once diagnosed then you can make decisions. This is all covered in detail on this forum if you search - I am however quite prepared to help if I can - no problem. Check those cam sensors.
Glyn & Amanonfire: Thank you! I just checked my cam sensors, one was ok, but the other had oil in it! Wow, would have never thought to check these! I literally had my CEL come on Wednesday night, and have hardly driven the car since then. So I figure I will order the cam sensors and pigtails and install these myself. Right? I figure the sensors can't be too hard to install...Also, I'm still thinking of getting a warranty and then eventually claiming my A/C blower regulator on that since its not such a priority with winter coming and all... Any advice on the warranty? Who to go with?
