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X150 2007 4.2 L loses voltage when ambient temp is more than 22 C

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X150 2007 4.2 L loses voltage when ambient temp is more than 22 C

Old 03-11-2019, 01:32 PM
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Default X150 2007 4.2 L loses voltage when ambient temp is more than 22 C

I have had Jaguars since 1974 starting with an S-Type 3.8 L, then moving over to an XJ 4.2 Series 1/69 model in 1977, XJ12 C 5.3 V12 MY 1977 in 1982, an S-Type factory new in 1999 and an S-Type R, which I bought at the Geneva Motor Show stand in 2003. I did all the mechanical work with my Jaguars by myself until 1999.

Now I am a half happy owner of a very low mileage XK 4.2, fully optioned. But when the ambient temperature and/or the temperature in the car rises above 22 C, the car wont start, all the bells and whistles chime warnings, the gear lever can not be moved. The battery/batteries are fully charged. When the outdoor temperature and the interior temperature drop below 22 C everything works jolly with some warnings remaining for a few minutes, but then no hiccups. The local authorized Jaguar service shop "guesses" after three full days of paid work, that it "must be the instrument cluster". Ok, so I tried to make the problem reappear by using a separate interior heater raising the interior/instrument cluster temperature to +50 C. No problems, the car starts without a problem. Does anyone have an idea?
Old 03-11-2019, 03:51 PM
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Welcome to the forum Mara50,

Good to have you with us at Jaguar forums.

Did the Jaguar service shop "guesses" include the benefit of using Jaguar Diagnostics to narrow the possibilities or did they simply prefer an extended lottery at your expense?

Follow this link
https://www.jaguarforums.com/forum/xk-xkr-x150-33/ to the X150 forum for help, advice and information.

Please add vehicle details to your Signature to help others to give relevant advice. Go to the User CP button on the left of the top menu bar, then Settings & Options under Your Control Panel. Select Edit Signature and enter the details.

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Enjoy the forums.

Old 03-11-2019, 05:58 PM
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Welcome to the forums.
Old 03-11-2019, 07:53 PM
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Congratulations on your Latest Jaguar!
I hope you get it sorted out soon.

Welcome to the forums from ElinorB.
Old 03-11-2019, 08:01 PM
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Welcome to the Forums.
Old 03-11-2019, 11:34 PM
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Welcome aboard.
Old 03-12-2019, 04:46 AM
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Welcome to Jaguar Forums Mara50,

Good to have you with us.
Enjoy the forum.

If you haven't done so already you should add your car details to your signature to help others to help you.
If you need help with getting around and using the forum follow this link for some help Forum Help
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welcome to the forum - enjoy!!!
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