Exhaust Emissions System - Catalytic Converters: Testing: Notes

Check converter for external damage such as cracks, heat damage or buckling. Replace if any damage is evident. If CO% levels are not to specification after proper procedures have been followed, converter is defective and must be replaced.
If converter overheats and temperature warning and protection system does not activate, check sensor, relay, solenoid valve and connecting wiring for defects and replace parts as necessary.