Dtc21 Ecm/Immobilizer Control Module Code Not Matched (Immobilizer Control Module Side); Dtc81 (P1623) Ecm/Immobilizer Control Module Code Not Matched (Ecm/Pcm Side); Dtc84 (P1620) Ecm/Immobilizer Control Module Code Not Registered - Suzuki sq-416-420-625 Service Manual