P1643 MAZDA – CAN Link ECM/TCM Circuit Network

P1643 MAZDA Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1643 MAZDA Possible Causes

Reprogram computer,Faulty Engine Control Module (ECM)

P1643 MAZDA Description

There is a communication problem with Control Area Network (CAN) link from the Engine Control Module (ECM) to the Transmission Control Module (TCM)