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2003 Toyota Echo 1.5L MIL Lamp on, O2 readings abnormal
This all started with a p0420. Judging by the mileage on the car, I thought it would be cut-and-dry ... cat replacement. When I hooked up the scan tool to check O2 activity, B1S1 O2 sensor was fixed at 1.27v , rear O2 .1v I back probed the upstream O2 and it w...
FIX posted 3/30/2009
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Message Closed w/FIX
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Related Documents & Media | VIN | JTDAT12303 |
| Engine | 1.5 L / 4 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp on, O2 Readings Abnormal |
| Occurs | Always |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/FIX
Vehicle Data
2003 Toyota Echo
| VIN | JTDAT12303 |
| Engine | 1.5 L / 4 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp on, O2 Readings Abnormal |
| Occurs | Always |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
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