P0864 AUDI – TCM Communication Circuit Range/Performance

P0864 AUDI Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P0864 AUDI Possible Causes

Faulty Transmission Control Module (TCM),Transmission Control Module (TCM) harness is open or shorted,Transmission Control Module (TCM) circuit poor electrical connection,Faulty Engine Control Module (ECM)

P0864 AUDI Description

The Engine Control Module (ECM) monitors the Transmission Control Module (TCM). The ECM sets the OBDII when there is a problem communicating with the TCM.