When driving to work yesterday my 97 1.8Q suddenly lost power and was rough for few seconds and then regained power. The check engine light did come on and went off at the same time. It felt like i lost a couple of cylinders. Today i checked for codes and came up with p0334 knock sensor 2 circuit low input(bank2) and p0442 Evap emission control system leak(small). I drove the car all day today with no problems. could water in my gas be the problem for the knock sensor because i was running near empty at the time?

And another thing i have my abs and brake lights on after a wheel bearing replacement. I was told that it is the left sensor circuit open causing the problem. will replacing that sensor fix my abs or is that something with the wiring and or the module?
Thanks

 

not sure about the knock sensor. the abs sensor was probably damaged during the wheel bearing change. if you had a shop do it, they should pay for a new sensor. if you did it, the code will tell you exactly which sensor and you just gotta replace it. of course make sure you check that it's plugged in b4 you go buying anything

 

I just found that the p0334 means that the sensor may be loose. How would i go about tightening it?