Possible causes – Reprogram computer – Faulty ECM Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1643 MAZDA Description There is a communication problem with Control Area Network (CAN) link from the Engine Control Module (ECM)to the
Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1643 Information for specific makes P1643 BUICKP1643 CADILLACP1643 CHEVROLETP1643 DODGEP1643 FORDP1643 GMCP1643 HONDAP1643 HONDAP1643 MAZDA
P1643 GMC – Engine Speed Output Circuit
P1643 HONDA – QBATT Battery Signal Circuit High Input
P1643 HONDA – QBATT Battery Signal Circuit High Input
P1643 BUICK – Engine Speed Output Circuit
P1643 CADILLAC – Engine Speed Output Circuit
P1643 CHEVROLET – Engine Speed Output Circuit
P1643 DODGE – Vehicle Theft Sys PCM in Learn Mode
P1643 FORD – Fuel Pump Monitor Circuit Low Input