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2004 Ford Explorer NBX 4.0L MIL Lamp on, P0174, p0171
Hello all, I am stumped on this one. Constantly sets long term fuel trim at +25 on both banks. It will come down 2 or 3 points at cruise speed but goes right back to +25 at idle. With the downstream O2 sensors replaced the degraded condition of both cats was r...
Summary posted 11/23/2016
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Message Closed w/Summary
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Related Documents & Media | VIN | 1FMZU73K04 |
| Engine | 4.0 L / 6 cyl / FLEX |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp on, P0174, P0171 |
| Occurs | Always |
| Misc. | Full Time 4WD |
Trouble Codes
| P0171 | Fuel System Too Lean (Bank 1) |
| P0174 | Fuel System Too Lean (Bank 2) |
Message Closed w/Summary
Vehicle Data
2004 Ford Explorer NBX
| VIN | 1FMZU73K04 |
| Engine | 4.0 L / 6 cyl / FLEX |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp on, P0174, P0171 |
| Occurs | Always |
| Misc. | Full Time 4WD |
Trouble Codes
| P0171 | Fuel System Too Lean (Bank 1) |
| P0174 | Fuel System Too Lean (Bank 2) |
Video