U
utopian_wildfire
Guest
was replaced last yr ? When the mechanic replaced my Cat Converter last year, he said he was able to use the previous o2 sensor without replacing it- they usually have to replace it. But he said I may need to replace it in the future. Now my service engine light has been on for over 6 months saying "catalytic system".. The Intake manifold was also cracked, but they attempted to seal that. What could be the issue?