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2005 Mercury Grand Marquis GS 4.6L MIL Lamp on
car runs great and the only complaint is the check engine light is on. only codes are po171 & po174 both lean codes. i installed a new fuel filter ( never been changed )scanned the o2 while driveing and they both seem to change rich to lean ( slow but i've see...
FIX posted 11/12/2009
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Message Closed
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22 Replies Received
22 Replies Received
Related Documents & Media | VIN | 2MEFM74W75 |
| Engine | 4.6 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
Trouble Codes
| P0171 | Fuel System Too Lean (Bank 1) |
| P0174 | Fuel System Too Lean (Bank 2) |
Message Closed
Vehicle Data
2005 Mercury Grand Marquis GS
| VIN | 2MEFM74W75 |
| Engine | 4.6 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
Trouble Codes
| P0171 | Fuel System Too Lean (Bank 1) |
| P0174 | Fuel System Too Lean (Bank 2) |
Video