why would car suddenly. shut off periodically

Question

1999 acura 3.0 cl shuts off driving I have code P0420 coming up

Answer 1

HI there,

This code is for the catalyst efficiency below threshold on bank 1. If the catalytic converter is broken up inside it could cause the car to stall. Otherwise it's possible you have an issue with the mass air flow sensor or fuel pressure causing the problem.