Po 420 code

Question

Replaced rear cat converter in April and car is back to doing the same thing,no power in hills. This is on a 2002 hyundai sante fe 2.7,any ideas would be greatly appreciated thanks. Read out po420 code

Answer 1

HI there

This code is for a bad front converter on bank 1. If it's plugged up you will deal with a loss of power. Remove the front O2 sensor on bank 1 and then drive the car. If there is more power, then it indicates an issue with a plugged converter and it will need to be replaced. This converter is directly off the bank 1 exhaust manifold.