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Richard, Jaguar Technician
Category: Jaguar
Satisfied Customers: 15524
Experience:  12 years at a Ford/Lincoln Mercury and Jaguar dealer as technician and shop foreman.
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I have 2001 xjr sup exchanged in fail safe mode. There are

Customer Question

I have 2001 xjr sup exchanged in fail safe mode. There are no codes present and the engine will not rev above idle
Submitted: 1 year ago.
Category: Jaguar
Expert:  Richard replied 1 year ago.

What tool did you use to pull the codes?

Customer: replied 1 year ago.
Used a snap on modis
Expert:  Richard replied 1 year ago.

Sorry for the delay.

That tool should be able to read the faults. Since the failsafe warning is on there should be codes stored. If we cannot communicate with the ECM then we should try another tool just in case. Let me know.

Customer: replied 1 year ago.
The scan tool does communicate to the ECM but it's indicating no codes present. I even checked the minitors...they all show complete
Expert:  Richard replied 1 year ago.

Sounds like we may have a problem with the electronic throttle. There definitely should be fault codes stored. I recommend trying a different scan tool. Also see if any codes are stored in the TCM as sometimes a throttle fault will be stored there. Double check all the connections to the throttle.

Customer: replied 1 year ago.
Okay I will focus on 5he throttle
Expert:  Richard replied 1 year ago.

Sounds good. Let me know.