2004 Mazda MPV P0057 and P0443 Fault Codes: Causes, Symptoms, and Purge Valve Location

Model: 2004 mazda MPV Fault Code: P0057 Posted: 2010-12-22 18:16

I own a 2004 Mazda MPV that is running roughly with a strong smell of rich fuel or unburned fuel coming from the exhaust. The engine runs smoother on highways but remains unstable under light load. I've already replaced all spark plugs, yet the issue persists. Could this be related to the oxygen sensor or a faulty coil pack? Additionally, where is the evaporative purge valve located in this model for diagnosis and repair?