P0685 Volkswagen -

Question

my 08 jetta 2.5 large fan has been running after shut down (excessively) when brought to advance auto and put on diagnostic machine returning a p0685 code

Answer 1

Hi there,

This code indicates an issue with the ECM power relay. Here is a list of possible causes. 

P0685 VOLKSWAGEN - Engine Control Module Power Relay Control Circuit Open

Read more: https://www.autocodes.com/p0685_volkswagen.html