P0430 Nissan -

Question

i have an 03 frontier with 3.3 took it to shop they said itneeded KNOX srnsor 5550 NEXT CODE 2DAYS LATER CATCODE420 430 SAID IT LOOKS LIKEPASSENGER SIDE CAT REPLACED $260 NOW30 MILES LATER CK.ENG. LIGHT ON NEEDSPRE.CAT .I havenotagreed tothat any ideas?

Answer 1

The Knock Sensor will not cause the engin light to come ON, but faulty catalytic converts are the most likely cause of the problem. Usually when one catalytic convert fail, the other one will also also fail.