P0170 Code and bad acceleration
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Newbie
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From: Dallas
2000 c230 Kompressor
P0170 Code and bad acceleration
Have a 2000 c230 kompressor and a few days ago the check engine light came on. Autozone's OBDII reader shows a P0170 Fuel Trim Malfunction (Bank 1) code. I've read that this could be caused by a faulty Mass airflow Sensor but there's more....I also noticed that when I try to accelerate quickly, the car "stumbles" badly and almost like it is about to stall. Acceleration is real gradual. Would a bad mass airflow sensor cause this type of problem also or do I have a bigger issue (like the turbo has died)?
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From: San Diego, CA & San Jose, Costa Rica & Stuttgart, Germany
1959 220S / 1979 230 G / 2002 A210 AMG / 2003 C320 SC / 2004.5 C320 SS / 2005 ML350 SE / 2008 smart
Off Topic
Originally Posted by demon
air mass sensor problem.
replace it by warrenty if u still have them.
by the way, u dont have a turbo, right?
replace it by warrenty if u still have them.
by the way, u dont have a turbo, right?
tatkinsjust need to ask DEMON if he is planning on attending
the 2nd Annual San Diego MB / AMG Meet on July 9th ???? Please click on LINK to get more info & sign up. Thanks.
-----------------------
ok, back to Turbo's and MAF Sensors....
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From: North Carolina
98 Black C43 , 12’ ML 350 Blutec
Originally Posted by tatkins
I do have a turbo. Car is 5 years old and has 70K miles so no warranty.
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From: Club202.com
1998 C43
Originally Posted by tatkins
I do have a turbo. Car is 5 years old and has 70K miles so no warranty.
BTW, you dont have a turbo, you have a supercharger or "kompressor."
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From: Dallas
2000 c230 Kompressor
Thanks for the information. I'm a newbie to the benz family. Had the car for about a year. Funny you mention the plugs because today it started idling very rough. Shakes like a "truck" while sitting at the redlights. Don't know if this is a further progression of the MAF going bad or an indication that the plugs need to be changed also. So I guess I'll change both the MAF and the plugs.
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From: North of Boston
C43AMG 1999
Originally Posted by tatkins
Thanks for the information. I'm a newbie to the benz family. Had the car for about a year. Funny you mention the plugs because today it started idling very rough. Shakes like a "truck" while sitting at the redlights. Don't know if this is a further progression of the MAF going bad or an indication that the plugs need to be changed also. So I guess I'll change both the MAF and the plugs.
by "fishing" i mean RPMs go up and then come back down and then go up again.
getting the MAF online and putting it on yourself is not a tough job to do. one can probably find MAF online for 200 bucks or something.
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Thread Starter
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From: Dallas
2000 c230 Kompressor
Thanks for the info. Just called the dealer (what was I smoking???) and they have it for around $450.00. I'm assuming that the MAF and an Air Mass Meter is the same thing because that the only name I've been able to find online. If that's not correct...somebody please stop me!!!
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From: North Carolina
98 Black C43 , 12’ ML 350 Blutec
Originally Posted by tatkins
Thanks for the info. Just called the dealer (what was I smoking???) and they have it for around $450.00. I'm assuming that the MAF and an Air Mass Meter is the same thing because that the only name I've been able to find online. If that's not correct...somebody please stop me!!!
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From: Club202.com
1998 C43
Originally Posted by tatkins
Thanks for the info. Just called the dealer (what was I smoking???) and they have it for around $450.00. I'm assuming that the MAF and an Air Mass Meter is the same thing because that the only name I've been able to find online. If that's not correct...somebody please stop me!!!
Member
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From: North of Boston
C43AMG 1999
Originally Posted by tatkins
Thanks for the info. Just called the dealer (what was I smoking???) and they have it for around $450.00. I'm assuming that the MAF and an Air Mass Meter is the same thing because that the only name I've been able to find online. If that's not correct...somebody please stop me!!!
Thread Starter
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From: Dallas
2000 c230 Kompressor
Thanks found it at a much lower cost. While I'm waiting on the unit to get here, I went ahead and changed out the air filter. When I took the old one out, I've never seen one so dirty. Replaced it with a new one and after a day or so the CEL went out......maybe it will come back later but the filter definately needed to be swapped out.
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From: Bay Area, CA
1999 C280
Shakes like a "truck" while sitting at the redlights. Don't know if this is a further progression of the MAF going bad or an indication that the plugs need to be changed also. So I guess I'll change both the MAF and the plugs.
without replacing any parts.. my idle got pretty rough while in gear when im at a stop. one day i decided to change my air filter because it has been a while, after i replaced it my CEL came on and it made me regret changing the air filter. i got the same codes as you from the odbII. although now the CEL comes on my rough idle has definitely lessened dramatically and my gas mileage is great (better then before).. i have a 1999 C280 and get 370 miles on a full tank compared to 340'ish prior to air filtler change.
did you change your plugs, if so did the rough idle stop completely?
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From: Dallas
2000 c230 Kompressor
No haven't changed the plugs yet but the CEL has stayed off since I replaced the air filter. Got the MAS today and installed it this evening. Car is running great!!! I plan to change the plugs out this weekend. Thanks.
Last edited by tatkins; Jul 6, 2005 at 01:10 AM.
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E350
Check engine after Installing K&N Filters
I Got the dreaded Check engine light after installing K&N Filters on my 08 E350. Checked the code and it was a Fuel trim malfunction. I called K&N and got the Best customer Service. Anyway, the Techy said to get Mass Flow sensor cleaner and clean the MFS before taking it to the dealer. The oil from the filter and the pre existing dirt on sensor wire could be the issue. I bought the MFS cleaner at Autozone 7 bucks. Removed the MFS from car, piece of cake I might add (YOU TUBE) sprayed this stuff on the sensor wires and re installed. reset code. drove car all day and so far no check engine light.
