I just scanned my car again after changing the filters and the same 3 codes came up. (P0301, p117, p0446)... I test drive it after changing them and I noticed a lot more power, and only wanting hesitate about once . When I scanned it, I noticed two symbols blinking red: O2S, and CAT. Is that o2 sensor and catalytic converter? To me it wouldn’t be the o2 sensor because I have ran on the same tank for 2 weeks. No change in fuel mileage. I did get new fuel injectors and a fuel pump but I’m scared if I do all this work it’s not going to fix the problem. Could the p0446 code be cause by a bad vent solenoid?