Repair Instructions
WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
A new converter with less than 100 miles on it may set DTC P0420 or P0430 due to out-gassing of the internal matting. Operating the vehicle at highway speeds for approximately 1 hour may correct the condition.
- Refer to Three-Way Catalytic Converter Replacement
- Refer to Exhaust Leakage
- Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 2
- Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 2
- Perform the HO2S Heater Learn procedure with a scan tool after replacing a heated oxygen sensor.
- Refer to Restricted Exhaust