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check engine code 51?

Israel

NAXJA Forum User
My check engine light came on so I tried the ignition on-off trick and got a code 12 (battery disconnected recently) and a code 51 (something about a lean condition). The code 12 I can figure out, but what would cause the code 51. Would it be something I need to worry about or can I just disconnect the battery to clear it and forget it? Thanks in advance.
 
code 51.......air/fuel at limit. ox. sensor signal input indicates lean air/fuel ratio condition during engine operation.
 
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