Restricted performance on my 2000 jaguar sj8.

Mandeep Singh

• 1184 Answers
• Posted on Aug 24, 2008

SOURCE: how do you get the jaguar out restricted performanc mode after repairs

Hi,
The problemcould be with the throttle module. Do check for the same. If you could let us know , what repairs were carried on the car, we could help better.



Thanks
proton

SOURCE: Jaguar s-type restricted performance displayed

Its most likely the coils and spark plugs, sometimes caused by oil leaking from the valve cover gasket. The coils deteriorate over time from engine heat and need to be replaced at 90-100k
Local garages don't have the Jaguar diagnostics terminal and are unable to do more than find basic error codes with a reader. Its important to get this fixed because it's causing damage to your caltalytic converters. They are expensive.

SOURCE: Engine Light on and Restricted performance message

You need to take to Jaguar technician to have Mil lamp codes read and cured the restricted performance is the engine protecting itself as there is a fault in the management system,usually fuel system related,It has gone into "Limp Home" mode to try to limit the damage done untill the fault is cured

SOURCE: 1999 Jaguar. Gearbox fault Restricted Performance

I would make sure the fluid maintenance is done. The most likely cause is the transmission or transfer case is gone internally.
I would take the vehicle to the transmission shop.

Good Luck

SOURCE: jaguar s-type restricted performance

I had the same problem. Restricted performance and running rough at 3000 RPM. I have an OBDII code reader and found that the problem was in the air mass flow sensor, which is just after the air filter. I pulled this out and found it was dirty and had butterfly wings in it. The last shop where I had the oil changed replaced the filter for me but put in the wrong size. Close but no cigar. Bought some *** Flow Sensor cleaner at auto store and fixed the problem. Get an OBDII reader with the ability to erase the codes. Comes in real handy.