P1601 CADILLAC – Serial Communication Malfunction

P1601 CADILLAC Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1601 CADILLAC Possible Causes

Serial Communication lost between Engine Control Module (ECM) and other control units

P1601 CADILLAC Description

CAN data bus, Engine Control Module (ECM)/Antilock Brake System (ABS)/Traction Control System (TCS)/Instrumentation Control Module/Diagnostic Control Module ??some communication lost