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1993 Ford Aerostar Eddie Bauer 4.0L Poor Idle Quality, Hesitation, Stall, MIL Lamp on
Vehicle O2 reading 4mv and stays in open loop causing rough idle and hesitation. Replaced O2 with factory part; same results. Disconnected O2 and checked voltage from sensor; scanner correct. Test drove vehicle; runs fine; off idle. Sometimes O2 sensor voltage...
FIX posted 11/27/2000
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Related Documents & Media 
| VIN | 1FMDA31X6P |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / MFI |
| Emissions | CA |
| Symptoms | Poor Idle Quality, Hesitation, Stall, MIL Lamp On |
| Occurs | Idle |
Trouble Codes
| 172 | O2 lean all of the time |
Message Closed w/FIX
Vehicle Data
1993 Ford Aerostar Eddie Bauer
| VIN | 1FMDA31X6P |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / MFI |
| Emissions | CA |
| Symptoms | Poor Idle Quality, Hesitation, Stall, MIL Lamp On |
| Occurs | Idle |
Trouble Codes
| 172 | O2 lean all of the time |
Video