EPC light is often the connector for the throttle position sensor. There is a service note for it, the repair kit includes the connector and 5-6 repair wires. The stock wires are too short, the wires shorten a bit with age and eventually the connection isn’t good enough. Sounds stupid but it exists… A vw shop would know about this.
Could be the throttle position sensor itself also.
EPC light is often the connector for the throttle position sensor. There is a service note for it, the repair kit includes the connector and 5-6 repair wires. The stock wires are too short, the wires shorten a bit with age and eventually the connection isn’t good enough. Sounds stupid but it exists… A vw shop would know about this.
Could be the throttle position sensor itself also.
Not sure why you’d do an ECM before those two?