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1997 Geo Metro LSi 1.3L MIL Lamp on
Hi guys, I need some help with post TWC theory. Working on a 1997 Geo Metro, 1.3 that keeps setting a Code P0420. The scan data shows B1S2 voltage fixed at 1.27 volts, KOER and KOEO. Checked that with 2 different scanners. Unplugged the sensor, voltage sta...
FIX posted 5/13/2000
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| VIN | 2C1MR5291V |
| Engine | 1.3 L / 4 cyl / GAS |
| Trans | 3-speed Automatic (Electronic) |
| Delivery | FI / EFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
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Vehicle Data
1997 Geo Metro LSi
| VIN | 2C1MR5291V |
| Engine | 1.3 L / 4 cyl / GAS |
| Trans | 3-speed Automatic (Electronic) |
| Delivery | FI / EFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
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