When your service light is on, what do you do ? maybe the method you can try first when you faced this situation. Try alternatives first if buying a scanner is not an option. On some makes and models, disconnecting the positive battery terminal for several minutes causes a computer reset, and the erroe code will clear.

 

 

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No reason, just like Allobd2

most auto parts stores will read the trouble codes for free. go by autozone or advance autoparts.