John -

Lots of good info on EEC-IV control systems (for Contours, this is only 1995) at:

http://www.dalidesign.com

There is a code lookup table (2 and 3 digit codes). The "free sample" pages also included EEC-IV introduction and basic test overview.

I havenâ??t had O2 sensor problems on my Contour (yetâ?¦), so I did some quick searching. Interesting info:

http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=655757&Forum=trouble&Words=173&Match=Entire%20Phrase&Searchpage=0&Limit=25&Old=allposts&Main=655757&Search=true#Post655757

http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=658023&Forum=trouble&Words=172&Match=Entire%20Phrase&Searchpage=0&Limit=25&Old=allposts&Main=657969&Search=true#Post658023

http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=642895&Forum=trouble&Words=172&Match=Entire%20Phrase&Searchpage=0&Limit=25&Old=allposts&Main=642895&Search=true#Post642895

Your car is now 10 years old. Oxygen sensors are practically a tune-up item at that age; Iâ??d replace them if thereâ??s any hint of a problem.

You might also try the engine-running test (look at the â??TESTâ? section at dalidesign), but I suspect theyâ??ll just confirm the O2 sensor codes.

The 519 code is for your power steering pump. Have you had power steering problems? If not, it may just be a bad pressure sensor.


1995 Contour GL V6 ATX T/C 1986 Mustang GT 5.0 2000 Windstar LX