DTC P0686-11: ECM/PCM Power Relay Control Circuit Low - Circuit short to ground: Action
WARNING: This page is about a different car, the 2015 Jaguar XF, 2014 Jaguar XF, and 2013 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.
- Refer to the applicable SYSTEM WIRING DIAGRAM(S) and check the engine control module relay circuit battery junction box for short circuit to ground, open circuit, high resistance
- Check and install a new engine control module relay as required