I have a 2000 Corolla in which I changed the oxygen sensor before the cat with an aftermarket Bosch 02. After changing I realize that there is a noticeable hesitation most of the time pressing on the gas from a stop.
It would have a delay for about 2 seconds than it would catch up quick and fast, like surging. I am trying to solve this problem as it can be very dangerous in city traffic.
While I changed the 02, I did sat most of myself on top of the engine in order to reach the 02. I wonder if I might have crush some hose that I didn't know of.
I also changed the 02 sensor behind the CAT with Bosch and I believe the CAT is dead as code P0420 is on. But the problem clearly exist after I changed the 02 before CAT with Bosch.
TIA
It would have a delay for about 2 seconds than it would catch up quick and fast, like surging. I am trying to solve this problem as it can be very dangerous in city traffic.
While I changed the 02, I did sat most of myself on top of the engine in order to reach the 02. I wonder if I might have crush some hose that I didn't know of.
I also changed the 02 sensor behind the CAT with Bosch and I believe the CAT is dead as code P0420 is on. But the problem clearly exist after I changed the 02 before CAT with Bosch.
TIA