Loss of power/X Type
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Junior Member
Joined: Mar 2018
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From: Tipton
Loss of power/X Type
Hi
I've got a low mileage X type 2001. Driven for 6 months like a dream, now I'm getting an Amber warning light with notification "Cruise control unavailable". More important is the car goes into idle mode at 30mph. Had the RAC look at it, No joy! had a diagnostic and although nothing major it did show PO171/PO174. Any member out there car to give me excellent input before Mr Mechanic has some of my money. I'm disabled and find it hard to either get in the engine or underneath.
I've got a low mileage X type 2001. Driven for 6 months like a dream, now I'm getting an Amber warning light with notification "Cruise control unavailable". More important is the car goes into idle mode at 30mph. Had the RAC look at it, No joy! had a diagnostic and although nothing major it did show PO171/PO174. Any member out there car to give me excellent input before Mr Mechanic has some of my money. I'm disabled and find it hard to either get in the engine or underneath.
Joined: Dec 2011
Posts: 120,439
Likes: 17,003
From: Durham, UK
Welcome to the forum deliciousoldfart,
Good to have you with us at Jaguar forums.
Follow this link https://www.jaguarforums.com/forum/x-type-x400-14/ to the X-Type forum for help, advice and information. The 'HOW TO' thread at the top is a good place to start for information on regular issues.
To avoid setting you a further challenge, I've added vehicle details to your Signature to help others to give relevant advice.
You can also visit the UK & Eire Region forum by following this link https://www.jaguarforums.com/forum/uk-eire-68/ to find other members in your region.
Enjoy the forums.
Graham
Good to have you with us at Jaguar forums.
Follow this link https://www.jaguarforums.com/forum/x-type-x400-14/ to the X-Type forum for help, advice and information. The 'HOW TO' thread at the top is a good place to start for information on regular issues.
To avoid setting you a further challenge, I've added vehicle details to your Signature to help others to give relevant advice.
You can also visit the UK & Eire Region forum by following this link https://www.jaguarforums.com/forum/uk-eire-68/ to find other members in your region.
Enjoy the forums.
Graham
Veteran Member
Joined: May 2012
Posts: 3,290
Likes: 1,327
From: Winchester, CA
I answered you inquiry in the other post you put up but here is the link again for the X-Type section
https://www.jaguarforums.com/forum/x-type-x400-14/
The codes P0171and P0174 usually indicate a LEAN fuel condition causing a misfire. The most likely cause is a major vacuum leak. The flashing amber light is a warning that you are causing damage to the engine. Mainly the catalytic convertors. With the amber light you automatically go into SAFE MODE limiting your engine to 2500 RPM and minimizing damage.
The usual suspects for vacuum leak are brake booster line, PCV hose from cam cover to intake manifold, IMT O-Rings and intake manifold gaskets. Since you don't state any recent work I would suspect a crak int eh Brake booster line or the PCV hose.
https://www.jaguarforums.com/forum/x-type-x400-14/
The codes P0171and P0174 usually indicate a LEAN fuel condition causing a misfire. The most likely cause is a major vacuum leak. The flashing amber light is a warning that you are causing damage to the engine. Mainly the catalytic convertors. With the amber light you automatically go into SAFE MODE limiting your engine to 2500 RPM and minimizing damage.
The usual suspects for vacuum leak are brake booster line, PCV hose from cam cover to intake manifold, IMT O-Rings and intake manifold gaskets. Since you don't state any recent work I would suspect a crak int eh Brake booster line or the PCV hose.
Joined: Mar 2015
Posts: 45,705
Likes: 4,685
From: Dural, Northwest Sydney. Australia.
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