Jaguar XJ 1997–1999 — technical service bulletin
Bulletin 31006 · NHTSA communication 629943 · issued Feb 1, 2002
Technical service bulletin
communication type
Engine and Engine Cooling
component
1997–1999
model years
5
vehicle entries
Official summary
Customers may complain of no-start or idle/driveability issues due to the throttle body bore and throttle blade becoming coated with a soft sticky carbon deposit. *tt
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.