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1997 Ford Explorer 4.0L Poor Idle Quality, MIL Lamp on
This vehicle will turn on the MIL and set codes 171 and 174. I heard about these plastic plenums having problems with vacuum leaks and pulled the plenum but could not see anything obvious. Then no one had new o-rings in stock so i had to put the old ones back ...
FIX posted 5/27/1999
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Message Closed
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| VIN | [No VIN Available] |
| Engine | 4.0 L / 6 cyl |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, MIL Lamp On |
| Occurs | Cold, Intermittently |
| Misc. | Suv |
Trouble Codes
| 171 | HEGO lean Bank 1 |
| 174 | HEGO lean Bank 2 |
Message Closed
Vehicle Data
1997 Ford Explorer
| VIN | [No VIN Available] |
| Engine | 4.0 L / 6 cyl |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, MIL Lamp On |
| Occurs | Cold, Intermittently |
| Misc. | Suv |
Trouble Codes
| 171 | HEGO lean Bank 1 |
| 174 | HEGO lean Bank 2 |
Video