Question

Code P0420 on 2002 Volkswagen, what would be min max to fix?

Answer 1

Hi there,

A minimum repair for this code would be a faulty rear O2 sensor, the max would be the bank 1 converter.

Answer 2

P0420 VOLKSWAGEN - Catalyst System Efficiency Below Threshold Bank 1

Read more: https://www.autocodes.com/p0420_volkswagen.html