Check Engine Light On!!
Thread Starter
Senior Member
Joined: Mar 2005
Posts: 450
Likes: 0
From: Beantown
2003 clk55
Check Engine Light On!!
The check engine light came on after i went over a pothole. And it has gone on for 24hrs straight and then just shut off. then after driving for a little it came back on. has this happend to any one be fore. i took it to my mechanic and he said its probably just a sensor.
THanks for any help!!
THanks for any help!!
Member
Joined: Jul 2003
Posts: 93
Likes: 0
From: Washington, DC
2001 CLK 320
Damn- your mechanic should've had more info than that.
Any time the Check Engine Light comes on, the mechanic should use an ODBII reader to get the message from the car regarding the issue.
If he didn't check that first, get a new mechanic... or get your hands on an ODBII reader. I got mine for about $100 and now I can see what the issue is my self when the CEL comes on.
Any time the Check Engine Light comes on, the mechanic should use an ODBII reader to get the message from the car regarding the issue.
If he didn't check that first, get a new mechanic... or get your hands on an ODBII reader. I got mine for about $100 and now I can see what the issue is my self when the CEL comes on.
Junior Member
Joined: Aug 2003
Posts: 35
Likes: 0
From: Bay Area
2001 CLK 430 conv. 2007 CLS 63
Damn dude!! The exact same thing happened to me yesterday!!! I hit a pothole and the damnlight came on. I have yet to take it to the dealership cuz i know they will charge $100 just to pop the hood. Keep me posted w/ what happened to your car. 
Junior Member
Joined: Aug 2003
Posts: 35
Likes: 0
From: Bay Area
2001 CLK 430 conv. 2007 CLS 63
I've reading about how if your gas cap is loose then the light will come on. I check my gas cap and indeed it was loose, but after I retighten it, the light is still on. I drove the car for 5 minutes and nothing so far. I'll check tomorrow and see what happens.... 
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Newbie
Joined: Dec 2004
Posts: 13
Likes: 0
From: Fort Worth, TX
CLK430 designo
Originally Posted by 2Pac
I've reading about how if your gas cap is loose then the light will come on. I check my gas cap and indeed it was loose, but after I retighten it, the light is still on. I drove the car for 5 minutes and nothing so far. I'll check tomorrow and see what happens....
MBWorld Fanatic!
Joined: Jun 2004
Posts: 1,880
Likes: 9
From: Seattle
05 E55
Originally Posted by clk22
I had it diagnosed and its either the MAF or the 02 sensors, HOw much do these cost to replace?
Thanks for the help so far
Thanks for the help so far
Your MAF will set off the O2 sensor codes. Most likely, it's your MAF. They typically go out between 50-70K miles. Search MAF sensor on google and you should be able to get it for $220 or cheaper on ebay. It's a 10 minute do-it-yourself job.
MBWorld Fanatic!
Joined: Jul 2002
Posts: 5,289
Likes: 9
From: So Cal
W213 '17 E43 ///AMG - W211, W208 no more
also, if it was your MAF, you'll notice a change in the performance of your car... if you don't really notice a loss of power, then it may just be ur gas cap
MBWorld Fanatic!
Joined: Jun 2004
Posts: 1,880
Likes: 9
From: Seattle
05 E55
O2 sensors on our cars don't typically go out that early, unless you've been using some cheapo gas. MAF sensors do. If your CEL doesn't go off after the MAF replacement, then keep it handy because it will go out.
Junior Member
Joined: Aug 2003
Posts: 35
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From: Bay Area
2001 CLK 430 conv. 2007 CLS 63
Originally Posted by Ironmudd
You need to drive it for a period of time without the error happening again and then shut it off and then repeat twice. You can't just start and stop it, it has to be driven for awhile. But if the error is still occuring (whatever it was), the light will not shut off by itself.
what's next...diconnect the battery or wait longer? i dont think is anything else like sensors and crap....i think.
MBWorld Fanatic!
Joined: Jun 2004
Posts: 1,880
Likes: 9
From: Seattle
05 E55
Originally Posted by 2Pac
I have driven the car for 4 days now and teh light is still on. 2 days ago i filled it w/ fresh high octane gas and i made sure the gas cap ws ont tight. I remember when i first hit that pothole my low fuel light came on and it was flashing although the tank was half full. When i parked the car i noticed the fuel cap resting on top so i figured that was the problem, but 4 days later and the light still on!!!
what's next...diconnect the battery or wait longer? i dont think is anything else like sensors and crap....i think.
what's next...diconnect the battery or wait longer? i dont think is anything else like sensors and crap....i think.
Originally Posted by str8ridin
Autozone, Advance Auto Parts etc. will read your codes for FREE .
Junior Member
Joined: Jul 2010
Posts: 16
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From: Manila
Clk320
Maf clk 320
My clk320 was working fine but now it kinda lossing its power a little bit i think you are right bout changing the MAF sensor i'll have it replaced tom...
