15/06/2026
Catalytic Converter Fault Symptoms: Causes, Codes & What to Do
Star Garage Mansfield — Engine Diagnostics Catalytic Converter Fault Symptoms: Causes, Codes & What to Do A failing catalytic converter rarely announces itself dramatically. It creeps up — a strange smell here, a hesitation there, then an engine management light, and eventually a failed MOT. Understanding the warning signs early is the difference between a manageable repair and an expensive replacement....
Rattling noise, rotten egg smell, or failed MOT? These are classic catalytic converter fault signs. Learn the causes and next steps with Star Garage Mansfield.