- Engine Light ON (or Service Engine Soon Warning Light)
P1871 Buick DescriptionUndefined Gear Ratio is the generic description for the P1871 Buick code, but the manufacturer may have a different description. Currently we have no further information abouth the P1871 Buick OBDII code. Please post your question on our "Questions" section for more information: AutoCodes.com Questions.
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P1871 BUICK CommentsHelp us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P1871 Buick code? Have you replaced any parts?
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