what does code P21001 mean?

Asked by Crystle Feb 18, 2016 at 08:07 PM about the 2008 Chevrolet Uplander LT Extended FWD

Question type: Maintenance & Repair

when I took My 2008 Uplander in to get the inspection done this code came up (P21001) It didn't affect the inspection , but the code keeps coming up.

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