obd1 code 51 51 air/fuel at limit. What are the possible causes?

1994 CHRYSLER 300
130,000 MILES
Avatar
DALESWENSON
  • MEMBER
  • 1 POST
I changed the oxygen sensor about two years ago and it seemed to fix it for awhile. It's starting to run rough especially when cold.
Mar 18, 2012 at 8:56 PM
Advertisement
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Avatar
JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 POSTS
I am showing a code 51 is a lean system. Check for vacuum leaks.
Mar 18, 2012 at 9:05 PM
Avatar
RASMATAZ
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 75,992 POSTS
You need to inspect and test again the O2 sensor-
Mar 18, 2012 at 9:08 PM
Advertisement