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Evo X General General discussion on the 2008+ Mitsubishi Lancer Evolution X

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Old 03-07-2011, 07:34 PM   #1
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Cel code p0170

I currently have a completely stock 2011 MR and it threw a service engine soon light on Sat as I was driving on the freeway. I had it scanned and it returned the code P0170 - Fuel Trim Malfunction. Aside to this the car is running a bit lean. Light went off after my buddy was done scanning it. Its been a day and it hasn't came back. Any ideas what may have caused this? I figured it could have been a bad o2 or MAF sensor but I haven't swapped anything under the hood.
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Old 03-08-2011, 11:14 AM   #2
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Check to make sure you vacuum line from the fuel pressure regulator did not pop off. That would make you run lean and throw this code if you are completely stock. Know issue on the Evo's.

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