Exhaust catalyst: Promotes chemical reactions reducing certain exhaust pollutants. Its exact function depends on catalyst type and engine.
Promotes chemical reactions reducing certain exhaust pollutants. Its exact function depends on catalyst type and engine.
A component or system name does not prove that the part has failed. Read the complete code, symptoms and live data, then follow documentation for the exact engine and equipment.
Examples for understanding the system, not a complete list or a diagnosis.
P0420P0430