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Engine running too lean #477143 11/10/02 03:15 PM
Joined: Nov 2002 Posts: 9 Michigan, USA D dainbramaged OP Newbie
OP dainbramaged Newbie D Joined: Nov 2002 Posts: 9 Michigan, USA	Hi! I own a 2000 Contour SE and I am getting a check engine light on my control panel. I had my codes run and a PO171 code comes up, which means engine running too lean. What does this mean? If anyone has an answer, please email me at dainbramagedemedic@hotmail.com or dainbramaged5@hotmail.com. Thanx

Re: Engine running too lean #477144 11/13/02 11:27 PM
Joined: Nov 2002 Posts: 216 G GregH CEG\'er
GregH CEG\'er G Joined: Nov 2002 Posts: 216	lean conditions are usually caused by low fuel pressure, vacuum leak, bad MAF, etc. 4 cylinder engines tend to suck the PCV line apart on the intake manifold (causing a vacuum leak). May also have a bad MAF (more common on V6). Need to check PID data (need a scan tool for that.)

Re: Engine running too lean #477145 11/14/02 08:03 AM
Joined: Nov 2002 Posts: 20 D Dave_dup5 New CEG\'er
Dave_dup5 New CEG\'er D Joined: Nov 2002 Posts: 20	Check for vacuum leaks, clean the maf, clear the code, if it comes back they need to check inputs/outputs-could be the 02 sensor itself.

Re: Engine running too lean #477146 11/14/02 03:06 PM
Joined: Nov 2002 Posts: 10 Atlanta, Ga L lsnr33 New CEG\'er
lsnr33 New CEG\'er L Joined: Nov 2002 Posts: 10 Atlanta, Ga	you are probably also getting 174 codes too, or will soon. I'm battling the same issue on a 97 2.5 v6. swapped all 4 O2 sensors and now getting a 1519 obd-II code which points to a Inlet Manifold Runner Control stuck closed...

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