Check Engine Light
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Joined: Oct 2006
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From: Edmonton
2001 CLK 320
Check Engine Light
So I am driving on the highway today and notice my check engine light on. I was out of town for a few days so I am not sure what exactly happened to the vehicle and who exactly was driving it in the family, but before I start poitning fingers I need to know what exactly happened. It feels like the car only uses half of its power right now. It lost its kick. Guys does this mean I might need to change my MAF? I am sure someone experienced this before. Please help! 
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From: Normal, IL
02 E55; 99 CLK430 (Sold)
Personally, after double checking the gas cap is on tight I'd go to Autozone or Pepboys or somewhere and have them check the codes for free. Then come back here and do a search on those codes. I'm sure someone has posted the ones that you end up pulling. If you're losing power it sounds like a MAF issue to me but I'd definitely pull the codes first and avoid the dealership until you know what you're dealing with.
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From: Somewhere in Maryland
2000 CLK 430 Cabriolet
Personally, after double checking the gas cap is on tight I'd go to Autozone or Pepboys or somewhere and have them check the codes for free. Then come back here and do a search on those codes. I'm sure someone has posted the ones that you end up pulling. If you're losing power it sounds like a MAF issue to me but I'd definitely pull the codes first and avoid the dealership until you know what you're dealing with.
The codes for the bad MAF are reflected with wording like 'Fuel trim malfunction' or something like that. There'll be two of em, one for each bank of cylinders.
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From: Edmonton
2001 CLK 320
I made sure to check my gas cap before posting here. Thats not the problem, man I just replaced my crank shaft positioning sensor last week and now this?! I wonder if this has anything to do with Canadian winters? I don't think there is Pepboyz or Autozone here in Canada which puts me in the **** out of luck category. So I guess I have to go tothe dealership now to get codes. I've done an exceptional job aoiding the dealer so far 
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From: Somewhere in Maryland
2000 CLK 430 Cabriolet
I made sure to check my gas cap before posting here. Thats not the problem, man I just replaced my crank shaft positioning sensor last week and now this?! I wonder if this has anything to do with Canadian winters? I don't think there is Pepboyz or Autozone here in Canada which puts me in the **** out of luck category. So I guess I have to go tothe dealership now to get codes. I've done an exceptional job aoiding the dealer so far
Anyway, hang in there. I've had to change my CPS, and now my MAF too so you're not alone. I'm sure 90% of the guys (and gals) out here have had these parts go bad back-to-back too.
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From: SCV SoCal
2002 CLK430
You could buy an OBDII code reader. I bought mine for about $60. It plugs into the existing OBDII port, tells failing code, comes with a list of what those codes mean, and allows you to reset them.
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Thread Starter
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From: Edmonton
2001 CLK 320
Whodat I guess statistic like that does make me feel like I am not alone. Hey is there anything else I should be expecting sometime after dealing with the MAF? Besides CSPS that is very common?
Marcus I am going to seeif I can get my handson the code reader man. Thanks a lot!
Marcus I am going to seeif I can get my handson the code reader man. Thanks a lot!
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From: Edmonton
2001 CLK 320
http://cgi.ebay.ca/Professional-OBDI...QQcmdZViewItem
or should I get the more expesive one?
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From: Edmonton
2001 CLK 320
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2003 s430 4Matic
Just curious as to why you had to replace the Crank Shaft Positioning Sensor.
I've got a 94 e320 cabriolet. It just began having problems starting. It turns over but won't start. After a bit you can try it again and it works. The dealer is saying we need to replace the CSPS. Chris.
I've got a 94 e320 cabriolet. It just began having problems starting. It turns over but won't start. After a bit you can try it again and it works. The dealer is saying we need to replace the CSPS. Chris.
Senior Member
Joined: Jan 2007
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From: Lindenhurst, IL
2001 CLK55
The CRANK Position Sensor is a common item. I have replaced that and my MAF on my CLK55. I have also had to replace both front wheel bearings. They both went out about 3 months apart. Those seem to be the 3 most common items.
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From: Somewhere in Maryland
2000 CLK 430 Cabriolet
Whodat I guess statistic like that does make me feel like I am not alone. Hey is there anything else I should be expecting sometime after dealing with the MAF? Besides CSPS that is very common?
Marcus I am going to seeif I can get my handson the code reader man. Thanks a lot!
Marcus I am going to seeif I can get my handson the code reader man. Thanks a lot!
Thread Starter
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From: Edmonton
2001 CLK 320
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From: Nor Cal
Piece of SH*T
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From: SCV SoCal
2002 CLK430
You may want to consider dumping the codes. I have to make some assumptions. (1) The car was running fine before you started. (2) You changed the plugs because of time and/or mileage and (3) only since that change has the CEL started burning a hole in your dash. If all that is true, then I think one of your spark plug wires is damaged.
Like it's name implies, a capacitive discharge ignition stores energy in a capacitor. When it receives the ignition signal from the ECU, the capacitive discharge ignition box then dumps that energy into a coil. Rather than building and storing energy in a magnetic field (old style coils do that), the coil simply ramps the voltage up as it passes the energy out of the secondary circuit and through the high-tension terminal. That energy is passed through the plug wire to the plug, which releases the energy when it fires. The ECU can determine if the energy hasn’t been released, because the CD box rats him (the current) out. If the energy isn’t released the ECU knows the plug didn’t fire. When that happens with any degree of regularity, the ECU illuminates the CEL.
This is assuming the engine doesn’t shudder like it running on seven cylinders. If that’s the case, I’d guess one of the coil packs aren’t plugged into the wiring harness.
It’s a wag, take it for what it’s worth.
Like it's name implies, a capacitive discharge ignition stores energy in a capacitor. When it receives the ignition signal from the ECU, the capacitive discharge ignition box then dumps that energy into a coil. Rather than building and storing energy in a magnetic field (old style coils do that), the coil simply ramps the voltage up as it passes the energy out of the secondary circuit and through the high-tension terminal. That energy is passed through the plug wire to the plug, which releases the energy when it fires. The ECU can determine if the energy hasn’t been released, because the CD box rats him (the current) out. If the energy isn’t released the ECU knows the plug didn’t fire. When that happens with any degree of regularity, the ECU illuminates the CEL.
This is assuming the engine doesn’t shudder like it running on seven cylinders. If that’s the case, I’d guess one of the coil packs aren’t plugged into the wiring harness.
It’s a wag, take it for what it’s worth.
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2001 MBZ CLK 320
my CEL went on too, its my..
upstream O2 Sensors 2x -- 292 each.
air flow sensor -- 385
total + tax/labor -- 1208.94
----------------------------
can anyone find me a cheaper price?? or know a good place near rowland heights area?? 626.
thanks
upstream O2 Sensors 2x -- 292 each.
air flow sensor -- 385
total + tax/labor -- 1208.94
----------------------------
can anyone find me a cheaper price?? or know a good place near rowland heights area?? 626.
thanks
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From: Nor Cal
Piece of SH*T
Thanks Marcus! Come to find out it was the spark plug wires, it wasn't damaged but loose. Dumb part of me, I was rushing it and I did it at night in my garage so I was rushing to get it done for dinner and a movie night..you know how that goes! Thanks for the help!
Last edited by CLKonDUBS; Feb 15, 2007 at 02:48 PM.
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300ce
Ted
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From: Nor Cal
Piece of SH*T
I actually didn't check the code as I didn't have time to read it since I was so anxious to find out the problem I just re-checked everything and that was the problem, a loose spark plug wire. BUT the codes for that I heard was like a misfire on certain cylinders on whichever one your having a problem on and that will run a CEL code and that's what I was probably running..a CEL for whatever cylinder that the wire was loose on. It didn't bother with Idling but it did turn on my engine fan when the engine wasn't even near warming/hot temperature..Hope this helps.
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1967 Morris Cooper "S", 1983 911SC, 1997 Toyota Tacoma, 1999 HD FXSTB, 1998 C43
Maf
The MAF will throw the codes P0170 and P0173 indicating fuel trim left/right banks, respectively. The MAF is about $200 shipped and I found mine on ebay. It is very, very easy to replace, comparable to say replacing your air filters. Please feel free to IM me and I'll help you out or you can call me - just IM me first. Also, the CPS or crank position sensor is replaced by many of 'us' as a preventative measure since the part simply fails without warning and is also fairly easy to replace. You'll need torx bits though. You need to buy a OBII reader with these cars, again they're like $40 on ebay. I have a C43 and can walk you through any questions you may have.
