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Home >> Buick >> 2012 >> Regal Base >> Repair and Diagnosis >> Engine Performance >> System >> Data Communications System >> Diagnostic Information and Procedures >> DTC U1817 >> Circuit/System Verification

Circuit/System Verification

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  1. Verify that DTC U0293 is not set.
  2. Verify that DTC U0074, U1814, B1428, B1370, B1380, B1440, B1441, B1325, or P0562 is not set.
  3. Verify that DTCs U1818, U182A, U1844, and U1847 are not set.