Brn4speed

So I have high flow cats on the car now and now the brand new rear o2s report p0157. When the service engine light comes on it will take me 3 tries to start the car up and then the dash lights flicker service engine light goes away car runs fine until all sensors are registered again. I found that if i clear the codes before I try and start the car again it's fine. Should I have the rear o2s tuned out.

1slowbusa

iTrader: (8)

When I had high flow cats on my car, I disabled the rear O2 sensors and the dtc's.

But I didn't think the rear O2 sensors would cause an issue with starting the car. Maybe I'm wrong.

SS SLP2

iTrader: (8)

above is k-rect, rear will not do anything but set a code
Johnny

Drj8787

Yes get rid of the rear o2s unless u have to pass strict emissions. and if that's the case then get ahold of some O2 simulators so they show a reading when doing the inspection. Tuning them out and removing is best if inspections aren't an issue