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P2101 on the 2008 Buick Allure

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

Bulletins for this model year that name P2101
SB-08-06-04-041B2009-05-22. Service bulletin. GENERAL MOTORS: MALFUNCTION INDICATOR LAMP-CHECK ENGINE LIGHT ON, HESITATION, REDUCED ENGINE POWER MESSAGE, DTCS P1125, P2101, P2120, P2125 OR P2138 SET (PERFORM REPAIR AS OUTLINED). *PE
PIC-4343B2008-12-02. Service bulletin. GMC:SERVICE ENGINE SOON LIGHT AND DTC P1125, P2101, P2120, P2125, OR P2138. THE VEHICLE WAS EXHIBITING A HESITATION AND/OR HAD THE REDUCED POWER MODE SYMBOL OR MESSAGE DISPLAYED. *PE

2 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.