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2001 Mazda Millenia 2.5L MIL Lamp on
Posted to Asian Driveability on 8/23/2006 6 Replies

Hello everyone this 01 millenia has a code 421 that I can't figure out. I have replaced the right(closes to the fire wall) upstream o2 sesnor. There are no exhuast leaks, no loose o2 sensors, the o2 sesnors wave patterns look normal. When looking @ the o2 sens...

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  Related Documents & Media  2001 Mazda Millenia

 
Message Closed w/FIX

car Vehicle Data

2001 Mazda Millenia

VIN JM1TA22151
Engine2.5 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursNot Applicable

Trouble Codes

400Egr system malfuncation
421warm-up catalyst system right efficiency below threshold
Message Closed w/FIX

car Vehicle Data

2001 Mazda Millenia

VIN JM1TA22151
Engine2.5 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursNot Applicable

Trouble Codes

400Egr system malfuncation
421warm-up catalyst system right efficiency below threshold