Fuel Trim Error
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01' CLK55
Fuel Trim Error
my check engine light came on , and the code error came up as a fuel trim error in bank 3 and bank 4. Has anyone had this code come up before? Can anyone tell me what kind of problem this is, and how much i should expect to pay to fix it?
thanks,
AL
thanks,
AL
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From: Bay Area, CA
01' CLK55
Re: Fuel Trim Error
Originally posted by clkal
my check engine light came on , and the code error came up as a fuel trim error in bank 3 and bank 4. Has anyone had this code come up before? Can anyone tell me what kind of problem this is, and how much i should expect to pay to fix it?
thanks,
AL
my check engine light came on , and the code error came up as a fuel trim error in bank 3 and bank 4. Has anyone had this code come up before? Can anyone tell me what kind of problem this is, and how much i should expect to pay to fix it?
thanks,
AL
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From: SFV, Ca.
W210, W220, W163, W164, C6
The (2) last fuel trim errors on my E430 was due to a defective air mass meter, running too lean...the culprit being a BMC CDA. Could also be a slow responding oxygen sensor or a vaccum leak...I suggest running a full OBDII diagnostic scanner.
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Re: Fuel Trim Error
Originally posted by clkal
my check engine light came on , and the code error came up as a fuel trim error in bank 3 and bank 4. Has anyone had this code come up before? Can anyone tell me what kind of problem this is, and how much i should expect to pay to fix it?
thanks,
AL
my check engine light came on , and the code error came up as a fuel trim error in bank 3 and bank 4. Has anyone had this code come up before? Can anyone tell me what kind of problem this is, and how much i should expect to pay to fix it?
thanks,
AL
First off the car has no bank 3 and 4, but a bank 1 and 2. Perhaps its cylinder 3 and 4? (which would be bank one, 5 to 8 are bank 2)
Fuel trim is the deviation (up or down) from the base map for fuel volume. +/- 25% is all that the ECU can do. If you have a fuel trim malfunction the ECU is trying to add or remove fuel volume to reach a lambda target and cannot reach the lambda target value.
Typically a failed MAF is the cause. The MAF can fail and NOT set a MIL- the phenomenon is called "drifting out of calibration". The mass of air metered is not actual, which skews the fuel load calculation. MAF's are a huge ducumented problem and should be a warranty item, if you are out of warranty they are approximately $275. Also look for "false air leaks" which are leaks or openings between the MAF and the throttle blade.
Another possibility, albeit not as likely as the previously mentioned, is a fuel system problem like a weak fuel pump or restricted filter. Its wise to replace the filter every 20K miles as it contains the pressure regulator for the fuel system.
Last edited by Brandon @ Kleemann; Feb 24, 2004 at 11:59 AM.
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Re: Re: Fuel Trim Error
Originally posted by KLEEMANN
clkal-
First off the car has no bank 3 and 4, but a bank 1 and 2. Perhaps its cylinder 3 and 4? (which would be bank one, 5 to 8 are bank 2)
Fuel trim is the deviation (up or down) from the base map for fuel volume. +/- 25% is all that the ECU can do. If you have a fuel trim malfunction the ECU is trying to add or remove fuel volume to reach a lambda target and cannot reach the lambda target value.
Typically a failed MAF is the cause. The MAF can fail and NOT set a MIL- the phenomenon is called "drifting out of calibration". The mass of air metered is not actual, which skews the fuel load calculation. MAF's are a huge ducumented problem and should be a warranty item, if you are out of warranty they are approximately $275. Also look for "false air leaks" which are leaks or openings between the MAF and the throttle blade.
Another possibility, albeit not as likely as the previously mentioned, is a fuel system problem like a weak fuel pump or restricted filter. Its wise to replace the filter every 20K miles as it contains the pressure regulator for the fuel system.
clkal-
First off the car has no bank 3 and 4, but a bank 1 and 2. Perhaps its cylinder 3 and 4? (which would be bank one, 5 to 8 are bank 2)
Fuel trim is the deviation (up or down) from the base map for fuel volume. +/- 25% is all that the ECU can do. If you have a fuel trim malfunction the ECU is trying to add or remove fuel volume to reach a lambda target and cannot reach the lambda target value.
Typically a failed MAF is the cause. The MAF can fail and NOT set a MIL- the phenomenon is called "drifting out of calibration". The mass of air metered is not actual, which skews the fuel load calculation. MAF's are a huge ducumented problem and should be a warranty item, if you are out of warranty they are approximately $275. Also look for "false air leaks" which are leaks or openings between the MAF and the throttle blade.
Another possibility, albeit not as likely as the previously mentioned, is a fuel system problem like a weak fuel pump or restricted filter. Its wise to replace the filter every 20K miles as it contains the pressure regulator for the fuel system.
AL
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clkal-
Its sounding more and more like a MAF problem. The MAF is the primary load calculation for fuel delivery. Oddly enough it is alaso part of the "function check" of the electronic "gas pedal"- develop a problem with the MAF and you can actually loose the accelerator pedal function! This is typically in conjuction with a ESP error in the multi-function display.
A MB dealer should have this sorted for you in no time.
Its sounding more and more like a MAF problem. The MAF is the primary load calculation for fuel delivery. Oddly enough it is alaso part of the "function check" of the electronic "gas pedal"- develop a problem with the MAF and you can actually loose the accelerator pedal function! This is typically in conjuction with a ESP error in the multi-function display.
A MB dealer should have this sorted for you in no time.
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From: SFV, Ca.
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Great informative write-up Kleemann...just wished I had these essential details prior to taking my car at the stealership...nevertheless, it's comforting to know that few members dedicate their time to go beyond just simple explanation.
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Hey retard, why dont you start suing MBUSA, your car shouldnt have any failure until approaching 100k miles. Just call the customer service ! they will give you a brand new car. idiot.
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Originally posted by BryBenz
Hey retard, why dont you start suing MBUSA, your car shouldnt have any failure until approaching 100k miles. Just call the customer service ! they will give you a brand new car. idiot.
Hey retard, why dont you start suing MBUSA, your car shouldnt have any failure until approaching 100k miles. Just call the customer service ! they will give you a brand new car. idiot.
LOLSeriously, that kit thread got way out of hand, let's not pull the same childish **** with this one...
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Don't worry, Josh.... that kit thread was a one time thing to let everybody know about a certain shop's *****ty customer service. But I guess BRYBENZ thinks that my new thread is related to it in some way.
I called Autobahn Motors and Beschoff Motorcars and BOTH service advisors told me that it is standard policy at all Northern California NOT to cover the cost of a rental or loaner car starting Jan. 1, 2004, unless the customer's car is in for warranty service. I found that to be hard to believe, so I ended up calling Smythe European (which i really didn't want to), however, my service advisor there, Greg Clark, is authorizing a C-class loaner car for the entire time my car is at their shop. Pretty cool. Car goes in friday morning.
I called Autobahn Motors and Beschoff Motorcars and BOTH service advisors told me that it is standard policy at all Northern California NOT to cover the cost of a rental or loaner car starting Jan. 1, 2004, unless the customer's car is in for warranty service. I found that to be hard to believe, so I ended up calling Smythe European (which i really didn't want to), however, my service advisor there, Greg Clark, is authorizing a C-class loaner car for the entire time my car is at their shop. Pretty cool. Car goes in friday morning.
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Originally posted by Josh K
Hopefully MB customer service will be more helpful/polite to customers than some the other people clkal's done business with LOL
Seriously, that kit thread got way out of hand, let's not pull the same childish **** with this one...
Hopefully MB customer service will be more helpful/polite to customers than some the other people clkal's done business with
LOLSeriously, that kit thread got way out of hand, let's not pull the same childish **** with this one...
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[QUOTE]Originally posted by Josh K
[B]Hopefully MB customer service will be more helpful/polite to customers than some the other people clkal's done business with LOL
These forums should be used for help not hate!
[B]Hopefully MB customer service will be more helpful/polite to customers than some the other people clkal's done business with
LOLThese forums should be used for help not hate!
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1951 Caterpiller D6
Originally posted by clkal
I found that to be hard to believe, so I ended up calling Smythe European (which i really didn't want to), however, my service advisor there, Greg Clark, is authorizing a C-class loaner car for the entire time my car is at their shop. Pretty cool. Car goes in friday morning.
I found that to be hard to believe, so I ended up calling Smythe European (which i really didn't want to), however, my service advisor there, Greg Clark, is authorizing a C-class loaner car for the entire time my car is at their shop. Pretty cool. Car goes in friday morning.
I've found that Greg Clark is a reasonable guy that will bend over backwards to make me happy. If it is the MAF and you are not too far out of warranty, ask him to see if MBUSA will cover it anyway since it is such a common problem.
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Originally posted by E55AMG99
Maybe this is Smythe's way to get their customer satifaction numbers up. After all, low numbers is what let Beschoff in their back yard.
I've found that Greg Clark is a reasonable guy that will bend over backwards to make me happy. If it is the MAF and you are not too far out of warranty, ask him to see if MBUSA will cover it anyway since it is such a common problem.
Maybe this is Smythe's way to get their customer satifaction numbers up. After all, low numbers is what let Beschoff in their back yard.
I've found that Greg Clark is a reasonable guy that will bend over backwards to make me happy. If it is the MAF and you are not too far out of warranty, ask him to see if MBUSA will cover it anyway since it is such a common problem.
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From: WOT somewhere in the Bay Area
1951 Caterpiller D6
Originally posted by clkal
cool. thanks for the info. i had 2 other advisors there previously that pissed me off so much, i switched over to Beschoff and Autobahn. Since Greg Clark was willing to work with me this time, I'm going back to Smythe. =)
cool. thanks for the info. i had 2 other advisors there previously that pissed me off so much, i switched over to Beschoff and Autobahn. Since Greg Clark was willing to work with me this time, I'm going back to Smythe. =)
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From: Bay Area, CA
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They found out what my check engine light was on for. It is a faulty mass air flow sensor. $550 parts/labor. I also had them look at my a/c which was on the fritz. They told me i needed a flush/refill and that a electrical temp control sensor was bad. $700 parts/labor. WHEW! i was worried that I needed to pay for a tranny rebuild. The 2004 C class they gave me as a loaner car for the weekend is pretty cool. only 600 miles. =)
