Guide :Car Questions

2003 F150: V6..P0171..MAF Sensor..the EGR Valve is opening or closing

I have a 2003 F150 with 4.2L V6. I keep getting the P0171 Code. I have cleaned the MAF Sensor and relpced the sensor (DPFE, I think) that measures whether the EGR Valve is opening or closing. I tur...

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