EC Light On
05-13-2009, 08:03 PM
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1999 Mercedes E320 Wagon & 1927 Bugatti Kit Car
EC Light On
The codes read PO 170 and PO 173 which is "fuel trim malfunction bank 1 and bank 2". I don't have a clue where to start looking. I think I need a decoding chart to decode the code chart. Any Ideas as to where I should start? I did add Technon (sp) fuel injector cleaner to the gas tank but I haven't driven it yet and I really don't expect any results.
05-13-2009, 10:24 PM
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1991 SC Miata, 1999 W210 Estate Wagon
A search will reveal numerous hits, most of which will tell you to clean your MAF first, and if that doesn't work, replace it.
PS: I did both and neither worked (bought the MAF for $150). I'm replacing all 4 O2 sensors as soon as I get parts from Autohausaz.com (I have 170,000 miles and crappy gas mileage). I have a feeling this might help with my 170 and 173 codes. We'll see.
PS: I did both and neither worked (bought the MAF for $150). I'm replacing all 4 O2 sensors as soon as I get parts from Autohausaz.com (I have 170,000 miles and crappy gas mileage). I have a feeling this might help with my 170 and 173 codes. We'll see.
05-13-2009, 10:26 PM
#3
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I'm assuming you mean CEL not EC light? EC being the AC system indicative of a compressor issue typically.
Start with cleaning the MAF with CRC MAF spray cleaner. No substitute.
*edit*
TA= slow typer
RM= fast typer
Start with cleaning the MAF with CRC MAF spray cleaner. No substitute.
*edit*
TA= slow typer
RM= fast typer
05-13-2009, 11:28 PM
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1999 Mercedes E320 Wagon & 1927 Bugatti Kit Car
Yes, I meant the check engine light, I am really bad with abbreviations so I have to ask what is the MAF and where is it located? Is CRC the brand of cleaner?
05-13-2009, 11:44 PM
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1999 Mercedes E320 Wagon & 1927 Bugatti Kit Car
05-14-2009, 12:11 AM
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1991 SC Miata, 1999 W210 Estate Wagon
Right. It's that black snorkel past your air filter (I think Benzworld.org has a good tutorial on how to clean it). Just loosen a couple of o-clamps and a connector and the unit's off. There is a certain technique in cleaning it so again, go to the other forum and look at their tutorial.
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05-14-2009, 07:51 PM
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MAF
I had the fuel trim codes errors also. I attempted to clean it. I reset the check engine light but it would come on 20 miles later. I purchased a new one and it cleared it up!
05-16-2009, 07:36 PM
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1999 Mercedes E320 Wagon & 1927 Bugatti Kit Car
Right. It's that black snorkel past your air filter (I think Benzworld.org has a good tutorial on how to clean it). Just loosen a couple of o-clamps and a connector and the unit's off. There is a certain technique in cleaning it so again, go to the other forum and look at their tutorial.
Yesterday I couldn't even spell MAF sensor and today I are a expert technician! Thanks again guys.
