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1992 Ford Aerostar Eddie Bauer 4.0L MIL Lamp on
the mil light will come on when the van is going up a slight hill with light presssure on the gas. the van doesn't run poorly when the light comes on. the light will stay on from that point and the code 173 is set. this code says the o2 sensor is not switching...
FIX posted 1/24/2001
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Related Documents & Media 
| VIN | 1FMDA41X8N |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / SEFI |
| Emissions | US FED EMISSIONS |
| Symptoms | MIL Lamp On |
| Occurs | Hot, Under Load |
Trouble Codes
| 173 | o2 sensor is not switching. |
Message Closed w/FIX
Vehicle Data
1992 Ford Aerostar Eddie Bauer
| VIN | 1FMDA41X8N |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / SEFI |
| Emissions | US FED EMISSIONS |
| Symptoms | MIL Lamp On |
| Occurs | Hot, Under Load |
Trouble Codes
| 173 | o2 sensor is not switching. |
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