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2001 Mazda Protege ES 2.0L MIL Lamp on
Posted to Asian Driveability on 8/10/2006 4 Replies

Hello,

This is back In my shop for this PO421 code I Am reading alldata.I changed front o2 sensor and cleared codes and The car is back in two days I kind of figured That? Before I go crazy Would I have A bad cat,Alldata says front sensor would cause this or ...

4 Replies Received (View Replies)

  Related Documents & Media  2001 Mazda Protege ES

 
Message Closed w/FIX

car Vehicle Data

2001 Mazda Protege ES

VIN JM1BJ22631
Engine2.0 L / 4 cyl / GAS
Trans5-speed Standard
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursNot Applicable

Trouble Codes

P0421Catalytic Converter Efficiency (Bank 1)
Message Closed w/FIX

car Vehicle Data

2001 Mazda Protege ES

VIN JM1BJ22631
Engine2.0 L / 4 cyl / GAS
Trans5-speed Standard
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursNot Applicable

Trouble Codes

P0421Catalytic Converter Efficiency (Bank 1)