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1990 Ford Taurus GL 3.8L Poor Fuel Economy, MIL Lamp on
koer test code 41/91 also not going into closed loop. balance test o.k. measure o2 with dvm front 2.20v , rear 1.22v vehicle run ok, no engine miss mil light comes on if you drive for awhile. checked wiring from o2 back to ecm ok. does not seem to have vac. le...
FIX posted 3/30/2001
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| VIN | 1FACO5349L |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / SEFI |
| Emissions | US FED EMISSIONS |
| Symptoms | Poor Fuel Economy, MIL Lamp On |
| Occurs | Always |
Trouble Codes
| 41 | rear o2 always lean - koer test |
| 91 | front 02 - always lean - koer test |
Message Closed w/FIX
Vehicle Data
1990 Ford Taurus GL
| VIN | 1FACO5349L |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / SEFI |
| Emissions | US FED EMISSIONS |
| Symptoms | Poor Fuel Economy, MIL Lamp On |
| Occurs | Always |
Trouble Codes
| 41 | rear o2 always lean - koer test |
| 91 | front 02 - always lean - koer test |
Video