CEL on and off, any ideas?
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From: dfw
'10 C63
CEL on and off, any ideas?
i haven't had a chance to check to see what code it's throwing, especially since it goes on and off.
i've got the eurocharged tune, charcoals removed, and k&n filters installed.
i've had the charcoals removed since i read about it a long time ago and no issues. got the tune 2 months ago, initially no issues until this. and the k&ns installed 1.5 months ago, and had no issues initially as well.
this cel issue has come up in the last 2 weeks or so. first i thought it was me not tightening the gas cap since it went away. although i feel i always tighten it. but when it happened again, i thought maybe it was bad fuel from my last refuel... but now i don't think that's it since i've filled up in a few different places and i've gotten this to reoccur. the last 2 times i recall this happening, including the cell coming on last night while driving around, it happened when i had about a half tank. and i think it will go away after a few engine starts once i fill it up again.
before i take it in to the dealer, or try to catch it when the code is there to get it read, i thought i might ask the members to see if you guys can think of anything.
thanks
i've got the eurocharged tune, charcoals removed, and k&n filters installed.
i've had the charcoals removed since i read about it a long time ago and no issues. got the tune 2 months ago, initially no issues until this. and the k&ns installed 1.5 months ago, and had no issues initially as well.
this cel issue has come up in the last 2 weeks or so. first i thought it was me not tightening the gas cap since it went away. although i feel i always tighten it. but when it happened again, i thought maybe it was bad fuel from my last refuel... but now i don't think that's it since i've filled up in a few different places and i've gotten this to reoccur. the last 2 times i recall this happening, including the cell coming on last night while driving around, it happened when i had about a half tank. and i think it will go away after a few engine starts once i fill it up again.
before i take it in to the dealer, or try to catch it when the code is there to get it read, i thought i might ask the members to see if you guys can think of anything.
thanks
Last edited by bluejae; Mar 27, 2010 at 02:19 PM.
Thread Starter
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From: dfw
'10 C63
here's the latest update. cel has been on since my original post. i was down to about an 1/8th of a tank and filled up. started the car and the cel is gone. this is so strange.
i guess since the code is gone, i would need to take it to the dealership, but then again i don't want them to erase my tune either.
i heard that park place motorcars of dallas is a renntech dealer but i haven't confirmed it. if that's the case, i'm hoping they'll be ok with me instructing them to not update the ecu. what do you guys think?
i guess since the code is gone, i would need to take it to the dealership, but then again i don't want them to erase my tune either.
i heard that park place motorcars of dallas is a renntech dealer but i haven't confirmed it. if that's the case, i'm hoping they'll be ok with me instructing them to not update the ecu. what do you guys think?
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
Sounds like your gas cap was not sealing properly or not on tight enough. That will set an evap code. The dealer can read and delete any codes without harming your tune. Ask them not to flash in any updates.
You may be able to borrow an OBDII code reader form an auto parts store to read and possibly delete any codes in your ECU.
You may be able to borrow an OBDII code reader form an auto parts store to read and possibly delete any codes in your ECU.
Thread Starter
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From: dfw
'10 C63
the service report said that they found codes for air mass sensors and adaptation. they found no leaks, checked engine values, all to spec. they cleared the code.
drove the car, had to fill up, 10 mins later, engine light on again. gotta love it
drove the car, had to fill up, 10 mins later, engine light on again. gotta love it
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Thread Starter
MBWorld Fanatic!
Joined: May 2008
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From: dfw
'10 C63
MBWorld Fanatic!
Joined: Feb 2010
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
You can get a MAF cleaner or electric contact cleaner (without lubricant) from the auto parts store to spray on the wire to clean it as best you can. Avoid direct contact with the wire to avoid damage to the MAF.
The K&Ns can be cleaned and lightly re-oiled or the original filters put back in. Not sure how much oil is too much and how much is too little on the K&Ns and might be a problem. For all you gain from them and the risk of letting more fine dirt into the intake I would just put the stock filters back in, but that is just my .02.
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From: Toronto, Ontario, Canada
2009 Fully loaded C63 AMG - black on black and CF trim; 2006 Lexus IS250 AWD;
I had the same issue before, and they replaced the same part, the purge valve, then the CEL was gone since then. I guess is because of mix usage of fuels, such as 91 from Shell and 94 from Sunnoco. That's what I've experienced here at Toronto.
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From: North Jersey
2012 CTS-V
Thread Starter
MBWorld Fanatic!
Joined: May 2008
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From: dfw
'10 C63
so far no more cel, i think my tune has been fine.
and since a few other members had the same issue, it might actually be the purge valve.
my service manager told me that there has been a campaign to replace the purge valve but not on the c63 but on the other c classes. maybe it's time for them to carry it over to the amg.
and since a few other members had the same issue, it might actually be the purge valve.
my service manager told me that there has been a campaign to replace the purge valve but not on the c63 but on the other c classes. maybe it's time for them to carry it over to the amg.
Thread Starter
MBWorld Fanatic!
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From: dfw
'10 C63
you have the same tune and filter as me. and now the same fix. how long ago was the purge valve replaced?
MBWorld Fanatic!
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From: North Jersey
2012 CTS-V
The tech at MB knows that I have an ecu tune and said it is
not related in anyway.
No CEL since purge valve was replaced. Car is running as strong
as ever.
Senior Member
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From: Seattle, WA & now Taipei, Taiwan
W211 E63
Car threw a CEL (Cat related), could it be related to the purge valve? I also put in a bottle of Cyclo Octane booster with only half tank of gas.
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From: North Jersey
2012 CTS-V
