Symptoms:
- Check engine light will be illuminated
- The engine may not have any drive symptoms except a check engine light
- Catalyst is damaged and clogging the exhaust
- Loss of power/ misfiring
Causes:
- The bank 1 catalyst has lost its efficiency or has broken apart inside and needs replacing
- The air injection system is not pumping the correct amount of air or too much air into the bank 1 catalyst due to a fault in the air injection system
- The O2 sensor post catalyst on bank 1 is not working to specifications
Possible Solutions:
- Replacing the post O2 sensor for bank 1
- Replacing the catalyst on bank 1
- Repairing the wiring to the O2 sensors if they got burnt on the exhaust