P0430 Diagnostic Questions for 1997 Ford Mountaineer - Validate Catalytic Converter Issue

Model: 1997 Mountaineer Fault Code: P0430 Posted: 2006-10-04 12:38

My 1997 Ford Mountaineer has triggered a check engine light with fault code P0430. My mechanic diagnosed the issue as a failing catalytic converter. Before accepting this conclusion, what specific diagnostic questions should I ask to validate their findings? For example, are the oxygen (O2) sensors functioning correctly and providing consistent readings? What is the MAF (Mass Air Flow) sensor reading under load conditions? These details can help confirm whether the issue truly lies with the catalytic converter or another component in the exhaust system.