Question about 2001 Jaguar XJ8

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Why does my Engine coolant low engine light come on when the coolant is full? My Jag is a 2001 XJ8

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The sensor swicth is just a switch could be grounded (short)

Posted on May 03, 2010

  • pittwater140 Sep 28, 2010

    Im replacing a coolant level switch at the moment. If you unplug the switch, bridge the two terminals in the plug you took off and the warning light doesn't come on after a restart, you know you have a faulty switch.


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Your thermostat may need replacement - they need changing every 2 years. Here is a link


Posted on May 12, 2010

  • singletonjon May 14, 2010

    your thermastat has nothing too do with low coolant levels it keeps coolant in the engine until it reaches operating tempature if your coolant is low there is a leak either out or inside the engine if theres no leak and the light stays on the circuit could be grounded



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2000 Jaguar xj8 turn over won't start stability control fail light on.

the stab light comes on if the battery is low because you are cranking the engine your aj26 v8 engine may have a common problem for cars up to that model/year with worn nicosil coated bores ie. low compression check the vin no. at your jag dealer you can get it started by removing the spark plugs and putting a egg cup of engine oil in to each of the cylinders the first thing to do is to check for fault codes using a obd code reader for a clue followed by a compression test

Sep 25, 2017 | 2004 Jaguar X-Type

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Check engine light

Take you Jag in for its 6 Mon/1 yer maintenance schedule check up for the can rest the light. This engine light will come on when the vehicle has reached certain mileage and/or time interval.

Unless, if the vehicle is have some other problems, like fuel pump, it not running the correctly, ERG valve is out, O2 sensor is bad, etc. But if your Jaguar XJ8 is doing just dandy. Then it need to be other type of service; such as, coolant changed, differnial fluid needs to be changed, or the automatic transmission also needs to be changed. GB...stewbison

Sep 05, 2011 | 2001 Jaguar XJ8

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Warning: fail safe engine mode

I do not know about a Jag. But the "fail safe engine mode " on my GMC means the Engine Controll Computer has quit working.

Jul 09, 2009 | 2001 Jaguar XJ8

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2001 jaguar XJ8 engine codes change what's the differences?

can be used but you must us your flywheel converter of original engine as crank sensor is different

Jul 02, 2009 | 2001 Jaguar XJ8

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2001 XJ8 oil light on but oil not low per Firesone Tech

the oil light generally means the oil pressure is low, most likely the sending unit is defective, but to be safe have the oil pressure tested with a mechanical test gauge, if it is low and u drive it this way you will ruin a $8,000 engine.

May 31, 2009 | 2001 Jaguar XJ8

1 Answer

2001 Jaguar XJ8 Engine Light/Stuttering

have you checked the o2 sensors on your exhaust

May 28, 2009 | 2001 Jaguar XJ8

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Engine Failsafe mode

Probably, your ZP HP-series transmission has failed. You didn't mention your car's mileage but failure is common from 60K - 120K miles. The "lifetime" synthetic fluid accumulates metal dust beyond the filter and magnet's ability to capture it, and sudden and catastrophoic failure occurs. Find a good independent shop (check your local Jag club) and they'll replace the transmission for around $6,000. The dealers charge twice that.

The other possibility is failure of the secondary cam chain tensioners. If you hear a clattering sound when you start the car, turn it off immediately and have the car transported to a good Jag shop. They can replace the plastic tensioners with metal ones for around $3,000. (Rough guess.) Make sure they do the same with the plastic primary tensioners and chain guides, and replace the chains. Failure to take this step after you hear the first symptoms will result in engine failure.

Also replace the plastic water pump and thermostat with alloy units.

Sorry for this bad news. I own a 2001 XJR and it is a fabulous car. It's still a Jaguar, though, and you're going to have to put a few thousand into it. Since these cars are selling for next to nothing on the used market ($12,000 for 80,000 miles), I consider preventive maintenance of $5,000 or so to be part of the investment in a world-class sedan.

Dec 31, 2008 | 2001 Jaguar XJ8

1 Answer

Engine light on, noisy idling, short coolant-2001 JAG VDP

Take the car to a specialist to check the timing chain tensioners, they are a known issue. I`d advise you to not use (or even start) the car till theyve been ruled out, the engine could be made scrap if the tensioners goes.

If it does need tensioners, get the later metal type ones fitted.

Dec 08, 2008 | 2001 Jaguar XJ8

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