After I got tuned, ive had the CEL pop up a few times and after a while it will go off. Is it a bad tune or what that could be causing the CEL. Ive gotten the CEL a few times but I only scanned it twice at autozone and got the same code and the light popped up again today driving home so im assuming its the same code. Anyone else get this code?

P0171
System too lean - cylinders 1-4

 

Ive been getting the same code after my tune. Car runs strong and shows no signs of knock. From the searching Ive done it seems to be a common thing with cars that have upgraded intakes and tunes. I will however be going back to my tuner just so he can double check everything.

 

okay cause i went back and he looked at the code and he said that the mitsubishi cats sometimes like to reset and show a code or something like that. i cant remember the exact thing he said

 

That code should be unrelated to.the cat, whatre your mods?

Do you have an a/f gauge?

 

That is from fuel trims too positive. Either the tune needs to be adjusted or something mechanical changed.

Nothing to do with a cat.

 

My mods are posted in my sig. Im getting an A/F gauge for xmas so hopefully I can monitor it myself

 

so should the shop retune it for free or what?

 

If it has to do with fuel trims and nothing was changed on your car then yes the shop should fix it no charge.

 

okay should i go there even if the CEL goes off?

 

I got that error before after Bryan@gst tuned me? I didn't notice anything odd with the AFRs from my gauge. Bryan modified the tune and it went away.

 

Vac line from the FPR?... That caused my last P0171...

 

Did your tuner rescale the maf? The car can be running perfectly, but because it's not doing what the car expects to see, it throws a code.

 

Use your scan tool to see when the freeze frame of the error occured. See what the car was doing. That will give you and your tuner a hint of where to look next. If you dont have a A/F gauge, I would recommend buying one for your own peace of mind when your driving you car.

 

I'm getting one for Xmas so soon enough!

 

Don't need a scan tool, I already stated what triggers it in post #5.