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
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
I am showing a code 51 is a lean system. Check for vacuum leaks.
Mar 18, 2012 at 9:05 PM
Avatar
RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
You need to inspect and test again the O2 sensor-
Mar 18, 2012 at 9:08 PM
Advertisement