Perhaps I've been searching for the incorrect term, but I couldn't find anything on a code I just read from my car; P1135 - Air Fuel Sensor (Bank 1, sensor 1).
My car has an erratic idle from a stop and surges/hesitates on acceleration. This is also felt holding the throttle at a steady rate on a flat road. The car doesn't make any knocking sounds either. I was just wondering if it could be anything more than just the sensor.
Kinugawa TS turbo (TS JDM Headers and UP)
Zerosports catted DP
The timing belt and water pump were recently replaced, and the cylinders were recently cleaned (I'm not sure if any of those factors have a role in this). Anyways, any input is greatly appreciated. I'm hoping its just the sensor, but if there's anything else I should look for, please let me know. Thanks in advance!