Question

1996 Chevorlet C1500, 5.7 Liter Recieved Codes P0430, P0420, P0327. wHAT WOULD BE THE PROBLEM?

Answer 1

P0430 catalytic below threshold Bank 2

P0420 catalytic below threshold Bank 1

P0327 Knock sensor low

Having a knock sensor code check any causes that may cause the knock sensor code to set, very low oil level, low coolant level, . If theses are good, you have a faulty knock sensor.