I have a 1994 Jaguar XJ6 Is there such thing as engine auto lock if you have a head gasket problem to keep water and oil mixing? I brought my car in for brakes and they've had it for months of problems getting parts and lots of excuses and when i finally gave up on them and went to pick it up it wouldn't start. It was running fine when I brought it there. They told me last they started it, it was blowing white smoke and jags have a bypass or auto disabler of the engine so that it won't cause more damage so maybe that's why its won't start. Is this bullshit? Is there such thing as a hyper lock that makes it that the engine won't turn over? I want to call them out on their lies if this is a lie and have them repair it so I can drive it home like I drove it in there. thank you for any information you can give. Jim

Asked by Nov 28, 2017 at 12:06 PM about the 1994 Jaguar XJ-Series XJ6 Sedan RWD

Question type: Maintenance & Repair

I have a 1994 Jaguar XJ6 Is there such thing as engine auto lock if you have a
head gasket problem to keep water and oil mixing?

2 Answers


The 1994 XJ6 does have a CTS (Coolant Temperature Sensor). The sensor itself and it's wiring harness are prone to failure on those models. Basically, what happens is the system causes the car to inject too much fuel into the engine, causing it to stall out or, in some cases, creating a "no- start" condition. This sensor has nothing at all to do with the head gaskets or preventing oil and water from mixing. If your headgasket was blown, you would see an increase in temperature and very muddy oil that a lot of people call the "milkshake". If you are not having those symptoms, I would suggest checking the CTS and its harness for issues. The system can be checked with an Ohm meter. Factory specifications for comparison purposes can be found online. I'm sorry to hear that you are having this issue and wish you the best of luck in getting it fixed.

1 people found this helpful.

Hello, i have a 1994 xj6 jaguar.that stall and run rough.it have cut off on me once before at a red light.can someone please help me out. Just can not find anyone that knows about this car

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