- Engine Light ON (or Service Engine Soon Warning Light)
P1871 DescriptionUndefined Gear Ratio is the generic description for the P1871 code, but the manufacturer may have a different description. Currently we have no further information abouth the P1871 OBDII code. Please post your question on our "Questions" section for more information: AutoCodes.com Questions.
P1871 Information for specific makes
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P1871 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 code? Have you replaced any parts?
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