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  1. #1
    Member
    Join Date
    Dec 2008
    Location
    france
    Posts
    93

    P1793 fault code. Ideas anyone

    Hi guys,

    Further to my previous post, my '97 xj8 3.2 has gone into potty-mode and has thrown up the fault code P1793.

    Virtually every light is on on the dash, and Gearbox Fault and Stability Control Fail flash up.

    Internet searches have found conflicting causes for the code.

    Car was left standing for around 4 weeks prior to trouble.

    cheers guys,

    Dan

  2. #2
    Senior Member
    Join Date
    Jul 2007
    Location
    Kent
    Posts
    1,840

    Re: P1793 fault code. Ideas anyone

    Sounds like a low voltage on your battery. Re charge fully before re trying it may be the first sign of your battery dying.
    1998 XKR Convertible, 2004 S-type V8 SE

  3. #3
    Senior Member
    Join Date
    Aug 2007
    Location
    Gloucester UK
    Posts
    1,285

    Re: P1793 fault code. Ideas anyone

    i agree, especially after this ' mild ' cold snap

    sounds like the battery is low on charge, or even duff, only a ' drop test ' can confirm this, as a voltage test is not a good indicator as to a batteries condition

    cheapest and easiest fix is to buy a new battery for about 65 , then move on from there

    especially if you know the battery to be over seven or so years old

    BB

  4. #4
    Member
    Join Date
    Dec 2008
    Location
    france
    Posts
    93

    Re: P1793 fault code. Ideas anyone

    Hi Brake Buster,

    What's a drop test?

    Cheers mate

  5. #5
    Senior Member
    Join Date
    Aug 2007
    Location
    Gloucester UK
    Posts
    1,285

    Re: P1793 fault code. Ideas anyone

    rather than putting a voltage test on the battery to see if it has 12v , you put on a battery condition analyser , this test the capacity of the amperage of the battery in comparison to its voltage ,

    its as simple as drive it to Halfords, or any friendly garage, and have them carry out the test ,

    the test will show up any defective cells within the battery that die first under load/stress like cold weather, or prolonged starting requirements

    if it fails the test , then a new battery is required, as no matter how much you charge it ( by the car or charger ) it will never hold its energy properly

    on average, a Jaguar battery which is a high quality unit will last over eight years, most will get to ten or twelve years of use, but when they fail, the car ( our XJ8's in particular ) start to throw all sorts of funny fault codes and flashing dash lights,

    its by no means a fix all one shot trick, but at least you will know right away if its works, and no fault finding at Jaguar required........

    BB


 

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