1991 Buick Century codes 43 and 44

1991 BUICK CENTURY
123,000 MILES • 6 CYL • FWD • AUTOMATIC
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1991CENTURY
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Engine idles up and down, getting codes 43 and 44, changed plugs getting ready to change wires. car runs very well otherwise. any clue to what these codes might be would be a big help. Thank You very much.
Dec 31, 2009 at 6:14 AM
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BLUELIGHTNIN6
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CODE 43 : ESC ERROR WITHOUT ESC MODULE

CODE 44: LEAN EXHAUST INDICATION
Jan 12, 2010 at 1:34 AM
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