2004 Lincoln LS P0171, P0174

ATTIKIS

MEMBER
2004 LINCOLN LS
V8
2WD
AUTOMATIC
95,000 MILES

I'm getting these codes. Car was riding great, all of a sudden the check engine light comes on, I get a code reader and I get codes P0171 and P0174. The car is now a little sluggish and sometimes seems to have no power. Help?

Friday, June 4th, 2010 AT 6:48 AM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

P0171/P0174 Lean fuel condition could be caused by one of the following below:

1. Vacuum leaks
2. EGR and PCV valve.
3. Low fuel pressure.
4. Dirty fuel injectors.
5. Mass Air Flow Sensor.