check engine electronics due to K&N Air Filter?
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check engine electronics due to K&N Air Filter?
HI,
Does anyone have experience with check engine electronics light appearing after you put in a K&N air filter?
I have a 97 E420 and I just installed a K&N air filter. when I drive the car next day, my check engine light came on. I searched the forum about this and most said its either gas cap open, bad O2 sensor or bad air mass filter.
I am wondering the reason for my check engine light came on after I installed the K&N air filter is because the air mass filter detected additional air intake due to the K&N air filter and therefore think its abnormal. Does anyone else have this problem? Is there a solution to this? Is there anyone using K&N air filter and is just driving with the check engine light on?
Edward
Does anyone have experience with check engine electronics light appearing after you put in a K&N air filter?
I have a 97 E420 and I just installed a K&N air filter. when I drive the car next day, my check engine light came on. I searched the forum about this and most said its either gas cap open, bad O2 sensor or bad air mass filter.
I am wondering the reason for my check engine light came on after I installed the K&N air filter is because the air mass filter detected additional air intake due to the K&N air filter and therefore think its abnormal. Does anyone else have this problem? Is there a solution to this? Is there anyone using K&N air filter and is just driving with the check engine light on?
Edward
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Joined: Nov 2001
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From: Southern California, USA
2003 CL55 AMG
It's possible that the K&N's threw some of the oil off of them and it shorted out the MAF sensor. I have heard of this happining, however, not with new K&N's. Usually happens when people over oil them at maintenance.
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Joined: Jul 2002
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From: Bay Area, CA
'97 MB E420 Sport/'88 MR2
You might want to try and disconnect the battery, leave it disconnected for about and hour, and then reconnect it. Maybe the computer will relearn itself with the new K&N filter. Doesn't hurt to try...
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From: Jacksonville Florida
209/W210 Estate /W211 modded by MBENZNL
Remove the Mass air sensor and clean it with a Can of brake clean
Please read the Instructions on the Cleaning the K and N Filter
Do Not Over OIL it as it will kick on the check engine lite and ruin the mass air sensor!
If the Check engine lite came on Yes check the gas cap,
If not take the car to the dealer to sort the problem out!
I Would Install the STOCK AIR FILTER If you take it in for warranty repairs so they cant blame it on a OVER OILED K/N Just My.02
And If you tossed the old filter go buy one its a LOT less than paying for a Mass air sensor!
BTW If you live in So cal I Can recommend a friend!That works at a Dealer
Please read the Instructions on the Cleaning the K and N Filter
Do Not Over OIL it as it will kick on the check engine lite and ruin the mass air sensor!
If the Check engine lite came on Yes check the gas cap,
If not take the car to the dealer to sort the problem out!
I Would Install the STOCK AIR FILTER If you take it in for warranty repairs so they cant blame it on a OVER OILED K/N Just My.02
And If you tossed the old filter go buy one its a LOT less than paying for a Mass air sensor!
BTW If you live in So cal I Can recommend a friend!That works at a Dealer
Last edited by MARK CUMMINS; Oct 24, 2002 at 03:07 PM.
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From: Fl
92 500sel/01 320e wag
K&N ruining sensors
This typically starts a lot of arguments. BTW George has an Oil testing Co, and is a technical director at MB Club of America
http://mbca.cartama.net/showthread.php?threadid=2198
http://mbca.cartama.net/showthread.php?threadid=2198
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Joined: Aug 2003
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From: NY
2014 E550 4matic,, sold 2012 E 350 4matic,,sold 2010 e350 4w,sold 2002 e320 se
Im running the K&N and I did notice a little more responsive throttle feel.Also noticed mileage drop,about 3/4 of a mile per gallon.
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From: HK (but constantly travelling)
98 W210 Advantgarde
Improved mileage and response noted too. Noticeable but can't say its a "big" change, as one would expect 
As already said, I believe it is just the over oiling that is the culprit in used filters. Had mine maintained by the mechanic and no problems when I had my K&N installed.......no problems after two years either.
As already said, I believe it is just the over oiling that is the culprit in used filters. Had mine maintained by the mechanic and no problems when I had my K&N installed.......no problems after two years either.
Last edited by Whitey; Mar 25, 2004 at 08:36 AM.
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From: Sarasota, FL
2000 E430 Sport
I noticed a minimal performance gain by installing a K&N, although I expected more. I've had no problems since I installed it over a year ago.
On a separate note, does anyone have any experience with aftermarket air boxes such as the RennTech?
On a separate note, does anyone have any experience with aftermarket air boxes such as the RennTech?
