PO171-174 Engine codes on Ford F-150

Average mileage: (–)
1 model year affected: 2004
1 person reported this problem
1 person shared problem details
Check engine light with PO 171-174 codes with the 5.4 motor. PCV elbow is leaking vacuum at the connection at the back of the throttle body by the firewall. The vacuum elbow has to be replaced and is available from Ford either with the entire PCV line or just the elbow. make sure you remove the battery cable for 30 seconds after the repair to clear the adaptive memories.
5 people like thisFlag inappropiate
Related Items:
problem has just started. obdII memo scanner shows codes po156,po161 and po171. these are bank...
some fuels seem to cause it with in 20 miles,,[contains up to 10% ethanol] others don`t for a...
It runs fine all year long until the temp drops below 20 degrees. Ford dealership seams like th...
It was running rough, but a tune up fixed the issues. I've checked all the usual suspects...fue...

Related Content