Question about 2006 Jaguar XJ8

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I have a 2006 Jaguar XJ8 that runs cold causing the engine failure light to come on. I have replaced the thermostat and temp sensor and still the problem persists.

My 2006 Jaguar XJ8 does not come to operating temperature. This causes the engine failure light to come on. I have already replaced the thermostat and engine temp sensor and the problem persists. The car has 36000 miles on it.

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Posted on Jan 02, 2017

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SOURCE: 2001 XJ8 Vanden Plas engine light

I've had the same problem on my 2001. It turned out to be the battery. Apparently the voltage had dropped to the point that the computer began to malfunction. I'd first go to a battery shop and have it checked under load before looking for other solutions.

Posted on Dec 12, 2008

  • 45 Answers

SOURCE: car heating system sudnely stoped operating

Are you having trouble getting the fan to blow, or does it blow cold air? If cold air, be sure to first check the coolant level as this could cause no heat for the cabin, and can also cause expensive damage to your engine.

If the coolant level is good, it can be a number of things:

There is a control valve in the engine compartment that opens and closes to allow hot water to travel through the heater core. Check for proper operation of this valve.

Secondly, on some of the Jaguars, they were filled with a special coolant that is not compatible with off the shelf coolants. If normal coolant was added to the system without a TOTAL flush, then the two coolants would mix and cause a coagulation. This thickening would in turn plug the heater core.

Lastly, on some Jaguars, there is an auxiliary electric water pump in the engine compartment that pumps the water through the heating system. If this pump fails, then you would get a LITTLE heat once in a while, (especially when high revs, or on a warmer day). This pump is fairly expensive, (what isn't on the Jag), but easy to replace.

Good luck, and let us know what it ends up being.

Posted on Apr 01, 2009

  • 79865 Answers

SOURCE: I have a 1999 Jaguar XJ8, there is a Check Engine

the gas gauge is not related, that would be a defective gas gauge sending unit in the gas tank, the check engine light indicates that one of around 200 poss faults has occured in the electronic engine controls, you will need to have the OBD 2 engine control system tested for the fualt code that is stored when the light is turned on.

Posted on Sep 10, 2009

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SOURCE: very noisy squeky fron suspension on jaguar xj8

You might need a lube job or you may need to see if noise is coming from another place such as your engine water pump, brakes, power steering. Look for leaks.

Posted on Sep 14, 2009

  • 1 Answer

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.

Posted on Mar 01, 2010

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