My car didn't go lean and i'm stlll on the stock pump. I changed out the plugs and didn't have any damage. My car didn't have any issue changing the tire size in the BCM, but changing the axle ratio yields a consistent error.
I actually haven't done the crank relearn yet so I'm hoping that sorts it. You've been an amazing src of help btw so thanks for that. I followed what you said and flashed to stock, ran the relearn, cleared the p160A and then got the 422. My tuner just got back to me and said that he can fix it with the tune so hopefully I'll be good to go soon.
Nice, glad you sorted it out! For my issues with drivability and the U0422 code, I followed the instructions here 3-4 times flashing back to stock each time to run the re-learn and no matter what the code always came back. I finally fixed it by NOT flashing back to stock before doing the relearn. It's been quite a while now and the U0422 hasn't returned and the car drives normally. [MENTION=13077]Brazenbuck[/MENTION] , you may want to give that a try. So basically I changed the gear ratio in forscan and ran the relearn instead of forscan change, flash back to stock (like this thread and the forscan warning tell you to do) and then relearn. Not sure if it will work for everyone but that's what worked for me. I had originally thought that maybe the tire size change was the main culprit but I had the same issues with and without that change. Now I just have a P115E - Throttle Actuator Control Throttle Body Air Flow Trim at Max Limit. It hasn't thrown any check engine lights but does show up in forscan. I've thoroughly cleaned the throttle body twice, off the car, but this code seems to persist. I can't imagine it's actually a bad TB since it's not even a year old yet. Anyone have this under similar circumstances and figure it out?
I don't have a dongle would need to buy one in that case also my car is a Euro spec-model not sure if that matters!
