Hello, my car starts but has massive throttle lag and a very bad misfire - not healthy at all. I have both P1646 and P1647 codes. I believe these are for the left and the right Upstream O2 Heater Sensors, since they both went out I suspected the relay had failed.

My car has a 1999 vin but is registered as a 2000, the actual relay locations don't seem to match diagrams for either year. If someone could point them out I'd be very grateful.


Driver Side

Passenger Side

 

The best/safest way to determine the exact relay is to look at the wire colors in the relay base.

The electrical guide shows the colors for each relay.

 

Hi,
The EG is wrong .

The HO2S relay is in the RHS bulkhead compartment irrespective of RHD or LHD.

See this post: The wire colours are in a subsequent post in the thread.
https://www.jaguarforums.com/forum/x...8/#post1775808