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2002 Mazda Protege DX 2.0L MIL Lamp on
This car runs decent, slightly rough idle. Check engine light came on with P0421. Looked at O2 sensors, front one switched at about .5 of a cycle per second. I thought this was very lazy. Put in a new sensor, and it switches not much faster - about 1 time per ...
FIX posted 6/6/2011
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Message Closed w/FIX
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7 Replies Received
Related Documents & Media | VIN | JM1BJ52251 |
| Engine | 2.0 L / 4 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | Fuel Injection / MPI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0421 | Catalytic Converter Efficiency (Bank 1) |
Message Closed w/FIX
Vehicle Data
2002 Mazda Protege DX
| VIN | JM1BJ52251 |
| Engine | 2.0 L / 4 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | Fuel Injection / MPI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0421 | Catalytic Converter Efficiency (Bank 1) |
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