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2001 Mazda Millenia 2.5L MIL Lamp on
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...
FIX posted 9/5/2006
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Message Closed w/FIX
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Related Documents & Media | VIN | JM1TA22151 |
| Engine | 2.5 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Not Applicable |
Trouble Codes
| 400 | Egr system malfuncation |
| 421 | warm-up catalyst system right efficiency below threshold |
Message Closed w/FIX
Vehicle Data
2001 Mazda Millenia
| VIN | JM1TA22151 |
| Engine | 2.5 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Not Applicable |
Trouble Codes
| 400 | Egr system malfuncation |
| 421 | warm-up catalyst system right efficiency below threshold |
Video