I have a 2004 Jaguar XJ8 and the fuel gauge is not working properly. It sometimes shows empty and the low fuel level light cones on even with a full tank. The fuel sending unit and fuel pump have been replaced with genuine Jaguar parts. the Rear Electronic Module has been rebuilt and the fuel gauge and electrical system have been tested with no issues found. After these repairs the fuel gauge shows about a quarter tank full when the tank is full. My local repair shop suggested that I take it to the dealer. I contacted Jaguar Anaheim Hills, CA and they said they don't have the computer required to resolve this issue. Does anyone know who might have the proper Jaguar computer system to resolve this issue or what else might be suggested?

 

There are TWO senders and Jaguar issued TSBs for this fault.
Attached Files
File Type: pdf
XJ310-01am Erratic Fuel Gauge Reading.pdf (44.2 KB, 1 views)
File Type: pdf
XJ310-03 Fuel Level Sender.pdf (306.7 KB, 1 views)

 

Also check the wiring and all the connectors under the rear seat. Mine was acting flaky and the connector under the rear seat was damp from a leak in the sunroof and the wiring harness was shorting itselt out causing me to get errors on the TCM and the gas gauge was erratic.

 

thanks

 

Local Jaguar dealer fixed the problem by installing part number C2C14163 sending unit, replaced part number C2C31125 installed by local mechanic, what is the difference between the two part numbers?