Engine

[Jam106]

My xf has just had performance restricted come on the display I drove slowly got to where I was going turned the engine on no warning any ideas

[Aubrey]

Hi Mark, 

So can i ask were you driving when the warning came on or had you just started the car? had it been used regularly or left standing?

and when you restarted it disappeared is that correct? 

Some times restarting the car will clear the warning. If that was the case probably just caused by electrical problem as happened on my XF. Had no further problems. 

Kind regards,

Julie. 

I have this article if this helps at all

WHAT DOES “RESTRICTED PERFORMANCE” MEAN?

Primarily seen on S-type and XJ-Series Jaguars, when the restricted performance error message lights up, it means the engine management system has determined a problem. Often this happens either at a cold start or while accelerating, and when it happens, the engine management system then throttles the engine, cutting back on performance in order to protect the vehicle. You’ll most likely cap out at 1800-2000 RPM when trying to accelerate. 

COMMON CAUSES OF RESTRICTED PERFORMANCE 

So, now that you know your car is sensing a problem, you need to get to the bottom of what’s causing the restricted performance signal on your Jaguar. The best way to really know for sure is to take it to a mechanic who specializes in imports, namely Jaguars, and have them hook it up to a diagnostic scanner. Once they know the exact source of the problem, they can get to the bottom of fixing it so you can be back at max performance sooner rather than later. 

 

There are a few likely causes to why this error message came on, including:  

 

- An issue with the catalytic converter that turns controls exhaust emission and minimizes toxic fumes;

- Fuel system problem, including a clog in the fuel line or an issue with the pump.

- Air intake issues, such as leaks in the air flow, mass airflow problems, intercooler hoses, or throttle body housing;

 

Some of these are very simple fixes, such as the breather hose disconnecting from the throttle body, or a leaking hose that needs to be replaced. In some cases, such as a problem with the turbo turbine inlet valve, you’re looking at a more complicated repair.

DIAGNOSING YOUR Jaguar

Before you take it in to a mechanic, there are some DIY solutions that may fix the issue.Take care to check:

 

- Air intake box or air filter housing, and check for cracks and make sure the clasps are fastened properly.

- Breather hose from the engine that crosses the intake pipe to be sure it’s secure and attached;

- Mass airflow sensor after the air intake box. Carefully clean it and verify the wiring harness is fastened;

- O-ring seals around the Oil dipstick and breather hoses between the engine and firewall;

 

If the car doesn’t start at all, the problem may be an issue with the fuel line or pump.

CLEARING THE RESTRICTED PERFORMANCE ERROR MESSAGE

In some cases, the simple “turning it off and on again” method may do the trick. If you can, pull the car into a parking lot or other safe location and turn it off. Give it two or three minutes, then switch on the ignition, but don’t turn the key all the way. Wait until the lights have gone off (except for the four that stay on all times). Then start the car. 

 

If this doesn’t take care of the problem, it’s important to drive the car as little as possible until you can get to the root of the problem and take care of it. 

 

 

[Jam106]

I was driving at the time but from a cold start for about 5 minutes I drove steady did manage to clear the message stopped for 15 minutes no message appeared but I still drove steady to get home 

[JOE-DOT-COM]

hi

get the codes read, it could be 1 of a 1000 things, otherwise its just pure guess work

a good code reader or ideally Jaguar ids/sdd to get accurate codes, faults and remedies

cheers

Joe

[Jam106]

Cheers I’ll see if I can get it looked at tomorrow 

[PaulT]

'- Fuel system problem, including a clog in the fuel line or an issue with the pump.'

A partially blocked fuel filter will cause RP intermittently.