Codes 51 Thru 55

Code 51


On 1984 models, indicates a problem in the closed loop fuel system. This code appears if during closed loop conditions, the oxygen sensor signal is either low or high for more than 2 minutes. On 1985 models, indicates oxygen sensor feedback system is latched lean.


Code 52


On 1984 models, indicates internal failure in Logic Module. On 1985 models, indicates oxygen sensor feedback system is latched rich.


Code 53


Indicates internal failure in Logic Module.


Code 55


Indicates end of message. This code will appear after all other codes have been displayed.