Question

2001 Volvo S60 2.4L Turbo with engine code P0422. What is the main catalyst efficiency below the threshold? What is bank 1? Is this an easy do-it-yourself job?

Answer 1

Hi there,

This means the converter is not cleaning the exhaust enough. This can happen when you have a bad rear O2 sensor or an issue with the way the engine is running. As far as DIY repair, that really depends on the abilities.

Answer 2

P0422 Code - Main Catalyst Efficiency Below Threshold Bank 1
Read more: https://www.autocodes.com/p0422.html