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LUVMyDiesel
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141 Posts
Discussion Starter · #1 ·
Got a SES light and a OBD generic code P21A9D. Anyone seen this one before? Can't find any info on what it might be. No performance degradation.
 

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Resident Curmudgeon
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24,163 Posts
P21A9D


one extra digit, no?
 
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