Boosted EM1 CELS P0170 & P0172
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Honda-Tech Member
Joined: Apr 2004
Posts: 322
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From: Colorado
Boosted EM1 CELS P0170 & P0172
I thought I had gotten everything figured out but I threw 2 new CELS took awhile for them to show. I did some searching here but didnt find anything on a turbo'd car just NA so I thought perhaps there is some other things I should be looking at.
1) P0170:
Fuel Trim Bank 1 / "The fuel compensation value for bank one exceeded the specified range."
2) P0172:
Fuel Trim Bank 1 Condition / "the fuel system for bank one was too rich."
I am new to Induction and OBDII Civics and have never ran accross these codes before the little reading I have done online tells me to look at some things:
1) Check the MAF (Do civic's have MAF I thought that was a MAP?)
2) O2 sensor 1 defective (I know its not its brand new)
3) Ignition misfire
4) Fuel injector issue
The Civic is running 5psi is tuned on a VAFC has a FMU, missing link. so I dont know where to start looking there are a few sensors that went to the intake that are not connected could this be one of the issues? I am also running 91 octane could that be an issue? Since the car is tuned on a VAFC can could that be the issue can I take that out using the VAFC II and if so how and where do I do that?
Like I said I am new to induction and I am lost any and all help is appreciated thanks!
1) P0170:
Fuel Trim Bank 1 / "The fuel compensation value for bank one exceeded the specified range."
2) P0172:
Fuel Trim Bank 1 Condition / "the fuel system for bank one was too rich."
I am new to Induction and OBDII Civics and have never ran accross these codes before the little reading I have done online tells me to look at some things:
1) Check the MAF (Do civic's have MAF I thought that was a MAP?)
2) O2 sensor 1 defective (I know its not its brand new)
3) Ignition misfire
4) Fuel injector issue
The Civic is running 5psi is tuned on a VAFC has a FMU, missing link. so I dont know where to start looking there are a few sensors that went to the intake that are not connected could this be one of the issues? I am also running 91 octane could that be an issue? Since the car is tuned on a VAFC can could that be the issue can I take that out using the VAFC II and if so how and where do I do that?
Like I said I am new to induction and I am lost any and all help is appreciated thanks!
Honda-Tech Member
Joined: Oct 2006
Posts: 2,329
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From: New England
Re: Boosted EM1 CELS P0170 & P0172
thats why u have those codes, your obd2 and your not tuned with an ecu.... your computer still thinks for itself... and your fmu throws extra fuel which sets a fuel trim code...
get tuned if you would like to keep that motor alive... your probobly washing out your cylinder walls as i type this...
get tuned if you would like to keep that motor alive... your probobly washing out your cylinder walls as i type this...
Honda-Tech Member
Joined: Jan 2004
Posts: 1,059
Likes: 2
From: houston, texas, usa
Re: Boosted EM1 CELS P0170 & P0172
Theres your problem, youre not tuned your hacked. As stated by 90Rexx,"your computer still thinks for itself... and your fmu throws extra fuel which sets a fuel trim code"...
You need to park it till you can get something to tune it, Hondata,Chrome, something. VAFC is a fancy light show.
You need to park it till you can get something to tune it, Hondata,Chrome, something. VAFC is a fancy light show.
Thread Starter
Honda-Tech Member
Joined: Apr 2004
Posts: 322
Likes: 0
From: Colorado
Re: Boosted EM1 CELS P0170 & P0172
Great, thanks guys I bought the car this way so I am a very lost. I am meeting with a shop to have the FMU and link pulled then get onto a wideband so I can get a little tune before I can get EMS. Its not my daily so I hope nothing major has gone wrong on it. The motor only has 79k and I dont want to f it up thanks again I really appreciate it!
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