One problem related to engine exhaust system has been reported for the 2001 Mazda Protege. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Mazda Protege based on all problems reported for the 2001 Protege.
Check engine light has been coming on for last year. Problem is with engine misfire/catalytic converter. We have replaced everything suggested: spark plugs, wires, catalytic converter, engine tune up, new tires, etc. Problem worsening. Car riding rougher, worsening gas mileage.