[HELP] Check Engine Light
Member
Joined: Nov 2004
Posts: 123
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From: S. California
MB C240
Originally Posted by StapleGun
Just for your 411, P0170 and P0173 were fuel trim, left and right banks, respectively on my vehicle - it led to a MAF replacement (Mass air flow sensor) that cured my CEL woes for once and for all. Your hesitant starting problems might be a Crank Position Sensor about to go on you, both common problems on MB's, as of late. Invest in the OBDII scanner and quit being penny-wise and dollar foolish, they're cheap and will save you the headaches of driving around incessantly to the $tealer$hip and others pleading for them to use their scanner.
My car seems losing power even i step on gas hard. It vibrates and shakes when comes to complete stop after certain amount of local running. This is so ANNOYING ! i took my car to a friend's local euro car specialist car shop, they can not find the problem at all. They scan the car with the computer and NOTHING on the car memory. They told me there must be at least something showing after the computer scan but they dont see anything at all. Some people said might be the mass air filter, my dealer advisor said might be the spark plug wires worn out. pls advise anyone??
Last edited by fchen911; May 2, 2006 at 06:02 PM.
Thread Starter
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Joined: Apr 2006
Posts: 3,255
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From: Seattle
w203 m112
When i spoke to the local dealership, they said it was not covered. it was also listed as NOT covered for 8 years/80k miles.... only for 2 years..
But your car is a 2005, it might still be covered by warranty? The place i took my car asked if i had the extended warranty cuz it could cover the MAF. unfortunately my car is an 01 and i didnt buy it new. YOu on the other hand might have these warranties! GL!
But your car is a 2005, it might still be covered by warranty? The place i took my car asked if i had the extended warranty cuz it could cover the MAF. unfortunately my car is an 01 and i didnt buy it new. YOu on the other hand might have these warranties! GL!
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1967 Morris Cooper "S", 1983 911SC, 1997 Toyota Tacoma, 1999 HD FXSTB, 1998 C43
I would think if you have the extended warranty your automobile's MAF should be covered. However, as far as the 85K warranty on emission components I would not think the MAF is covered, that would be applicable to componenents like the actual catalytic converter and egr valves - I am speculating on those however.
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Joined: Mar 2005
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From: Houston, Texas
2017 G63 AMG, 2019 G550
Will faulty MAF sensor leave me stranded?
My check engine light is on so I went to the dealer this morning and my SA hooked it up to their diagnostic machine and sure enough he came back and said that my MAF sensor is about to go out. (I am going back next week to get it replaced, they didn't have the part) My question is this, if the sensor does go out this weekend will this part leave me stranded like my faulty crank position sensor did last week? My SA said that it wouldn't, but I would like to get other opinions. I am about to take the car on a road trip this weekend and put approx. 500 - 600 miles on it.
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From: Seattle
w203 m112
My local tech (tech for 30 years! straight from germany w/ the cool german accent... who has only worked on MBs his entire life..) said that I would be fine w/ a faulty MAF for a while. The only deal is that my fuel mileage would be worse. Because my voltage reading was higher than recommended, my car was probably running rich because the MAF thinks there is more air than there really is going into my car. He tried to sell me the MAF for 388 + 40 dollars labor, but I found the thing online for 175 +18 bux shipping and i know the install is very simple! clearing the code isnt hard either!
Shouldnt ruin your car.... if you dont replace it immediately, thats the impression i got at least. I even specifically asked him if it would lead to serious damage if not replace somewhat quickly.... and he said it wouldnt.
so... Good luck with yours!
Shouldnt ruin your car.... if you dont replace it immediately, thats the impression i got at least. I even specifically asked him if it would lead to serious damage if not replace somewhat quickly.... and he said it wouldnt.
so... Good luck with yours!
Thread Starter
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From: Seattle
w203 m112
if you pull off the air box, you will see it right behind the engine... its towards the back of the engine near the windshield... there is a little bracket that holds it in place and... thats about it. well the plug too... pull off the bracket and then pull off the plug, then just yank it out...
thats what i did... hopefully i didnt break it... GL
thats what i did... hopefully i didnt break it... GL
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From: SF Bay Area, CA
2006 E55 and 2002 E320
Seriously, this is like, the tenth Mass Air flow Sensor I've heard that's been broken in the past few months on these forums. Maybe I'm exaggerating but this is seriously a common problem.
Thread Starter
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Joined: Apr 2006
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From: Seattle
w203 m112
okay.. my issues continue
So, After talking to the mb tech... (he who tells me my MAF is busted, he tested the voltages and said it was too high - cost me 96 dollars to have the tech find this out for me..) I decided to not have the tech buy me the MAF for 390 dollars and install it for 40 dollars (half hour of labor), instead i ordered one online for 193 dollars shipped and installed it myself. Really quick and easy....
So, I get the new MAF in, i go to the local shucks and have them clear my CEL. Im all happy that i fianlly got to deal w/ this thing.. AND of course while driving down to a friend's place.... the CEL light comes back on.
Okay, so now im pissed. I paid 96 dollars to have the tech tell me whats wrong with my car cuz i couldnt pinpoint it myself. i spent 193 dollars on a new MAF and after almost 300 dollars I am no where closer to where i started. I Get the impression that the tech screwed me over here and that i should get a bit of my 96 dollars back. He spent time to not give me the proper solution then offered me a ridiculous price to fix the thing.
So, now im 300 dollars down, pissed at the techs, and still have problems w/ my fuel trim
halp? can techs do this to me and get away with it? im so mad 
General question to those who own w203's. I noticed while pulling out my MAF that the little tube/pipe that it attaches to is pretty loose. is this normal? I figured it was lose to help pulling the MAF in/out and allow for easier connections between the MAF and the air box.
-j0hn
So, I get the new MAF in, i go to the local shucks and have them clear my CEL. Im all happy that i fianlly got to deal w/ this thing.. AND of course while driving down to a friend's place.... the CEL light comes back on.
Okay, so now im pissed. I paid 96 dollars to have the tech tell me whats wrong with my car cuz i couldnt pinpoint it myself. i spent 193 dollars on a new MAF and after almost 300 dollars I am no where closer to where i started. I Get the impression that the tech screwed me over here and that i should get a bit of my 96 dollars back. He spent time to not give me the proper solution then offered me a ridiculous price to fix the thing.
So, now im 300 dollars down, pissed at the techs, and still have problems w/ my fuel trim
halp? can techs do this to me and get away with it? im so mad General question to those who own w203's. I noticed while pulling out my MAF that the little tube/pipe that it attaches to is pretty loose. is this normal? I figured it was lose to help pulling the MAF in/out and allow for easier connections between the MAF and the air box.
-j0hn
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From: Seattle
w203 m112
back to old air filters
Okay, so i gave in and put in the old (stock) air filters. They are a bit dirty and all, but i figure that maybe my k&n air filters could be messing with the current set up. An hour of driving around the w/ CEL and the light goes off. Hasnt come on since.
So, what is going on here? Did my k&n air filters seriously put in soo much more air that my engine couldnt get rid of the air? I could have sworn ive seen people just right k&n air filters w/o any sort of mod to their exhaust. im so confused, someone fill me in?
thanks!
-j0hn
So, what is going on here? Did my k&n air filters seriously put in soo much more air that my engine couldnt get rid of the air? I could have sworn ive seen people just right k&n air filters w/o any sort of mod to their exhaust. im so confused, someone fill me in?
thanks!
-j0hn
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From: Huntington Beach, Ca.
'17 Jaguar XF
Originally Posted by TruTaing
An hour of driving around the w/ CEL and the light goes off. So, what is going on here? Did my k&n air filters seriously put in soo much more air that my engine couldnt get rid of the air?
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From: Huntington Beach, Ca.
'17 Jaguar XF
Originally Posted by TruTaing
thats the thing though... i didnt reoil the filters... i just used them straight out of the package...
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Joined: Feb 2005
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From: Maryland USA
2003 C230 Coupe
I installed those cloth oil impregnated filters on my 99 C230 and bingo not many days went by for me to get a P0170 code. Reverted back to OEM paper filter. cleaned the MAF and no more problems. Those things are more problem than they are really worth. Too messy anyways to keep cleanind and re-oiling.
I don't believe that because the let more air through the performance would improve, as the mixture ratio is controlled by a closed loop circuit. So save yourself some hassle and keep it simple.
I don't believe that because the let more air through the performance would improve, as the mixture ratio is controlled by a closed loop circuit. So save yourself some hassle and keep it simple.
