P0420 Fault in 2000 Toyota Celica 1.8VVTi: Causes, Diagnosis & Solutions

Model: Toyota Celica 1.8VVTi Fault Code: P0420 Posted: 2006-07-26 03:31

I own a 2000 Toyota Celica 1.8VVTi with 60,000 miles. The vehicle has been fully serviced at Toyota and all original exhaust components and sensors are factory-installed. Approximately six months ago, the engine checklight activated. A handheld OBD-II scanner revealed a P042