What does P0865 Mean? OBD-II Code P0865 is defined as a TCM Communication Circuit Low If the Transmission Control Module (TCM) cannot communicate with other modules or the engine control module (PCM) can not communicate with the PCM, code P0865 will be set. engine code P0865P0865 fixobd P0865dtc P0865obd code P0865obd2 P0865P0865 car codediagnostic code P0865car code P0865check engine code P0865fehlercode P0865P0865 fiatcodigo P0865codigo falla P0865P0865 kody b??dówcodigo de falla P0865 What are the common causes of P0865 ? The P0865 trouble code is almost always the result of a faulty traction control ON/OFF switch, which usually occurs due to liquid spills on the switch in the vehicle’s interior. It is also possible that the issue is the result of damaged electrical components in the system, such as shorted wires, corroded connectors, or blown fuses. How do you troubleshoot P0865 ? The valves of each cylinder are kept closed using a pair of arms that replace the conventional engine's roller-type rocker arm. P0865 code one of these arms follows the cam profile while the second arm connects to the valves. During normal engine operation the two arms are joined by a locking pin. Searches related to P0865 - TCM Communication Circuit Low p0864 vw p0685