Question about 2000 Ford F150 Flareside SuperCab

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I failed my inspction the code was 171 - 2000 Ford F150 Flareside SuperCab

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The CEL should also be on in your truck. The Ford DTC (Diagnostic Trouble Code) P0171 is for bank one (passenger side) on 6 and 8 cylinder vehicles. There are also several differenct things that might cause this trouble code.

Disconnect the negative battery terminal.

1. One of the most common causes is a bad EGR differential Pressure sensor. It is mounted on the engine and is connected to the EGR valve via two rubber hoses. The sensor itself has an elecrtical connector, 2 hose fittings and is rectangular about 3" X 2". Replace the sensor if necessary.

2. Another cause may be a bad or dirty Mass Airflow (MAF)sensor. The MAF sensor is located inside the air inlet duct near the throttle body. The mount and electrical connector is outside the duct. The MAF is basically a hot wire in the airflow stream. It is fairly easy to clean. Disconnect the air inlet duct just upstream of the sensor. You will see a screen, and behind the screen is the MAF sensor wire. Use a good quality spray ELECTRONICS cleaner. Use ONLY electronics cleaner! Any other solvent may damage the MAF sensor. Spray the MAF sensor wire through the screen and let it sit for 5-10 minutes. Give it another shot of electronics cleaner and let it sit another 5-10 minutes. Reconnect the air duct and start the engine.

If the CEL comes on again, you may have to replace the MAF sensor. If that fails, it might be a vacuum or fuel delivery problem. Honestly, I don't know that much about how to correct vacuum problems.

God Bless and good luck!

Posted on Aug 29, 2010

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