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Thread: Explaination of fault ?

  1. 13th January 2014, 12:31 PM #1
    CraigH
    CraigH is offline Master
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    Explaination of fault ?

    I have a 2003 D2 V8 and sometimes when cold it doesn't always start smoothly. Kinda sounds like its not quite getting enough fuel for a second then it runs just fine.

    A couple of times I've had that fault chime sound so I thought I'd plug in the nanocom and check for faults.

    This is what I found.

    p0314 = Lambda Sensor upstream Catalyst bank 1 drive cycle C occurred 1 times
    signal missing
    Fault is currently present
    Fault determined as persistent
    Fault causes the mil lamp activation.

    Could this be a O2 sensor gone bad?

    Any ideas appreciated.

    Craig
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  2. 13th January 2014, 01:25 PM #2
    Outback 1
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    Sounds like it could be the problem to me can you get hold of one to try

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  3. 13th January 2014, 04:03 PM #3
    CraigH
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    Just spoke to my LR mechanic. From my description he is 90% sure it will be a head gasket....eek!!!!

    I love my Disco, but holy crap it's turning into a money pit!!
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  4. 13th January 2014, 04:25 PM #4
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    bee utey
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    Next time you cold start your engine, run it only for a couple of seconds. Then remove all the spark plugs and look for traces of coolant. If you find a wet one at either end of the motor there's a fighting chance it's just a head gasket. If it's in any of the middle 4 cylinders you definitely have a failed block. Kiss your savings account goodbye.

    Oh and coolant will rapidly poison an O2 sensor so that will need replacing after the fixup.
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  5. 13th January 2014, 05:45 PM #5
    CraigH
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    LR mech reckons in his experience with the 4lt motor 90% it's head gaskets. Said he's done heaps, he said sometimes they only last 4-5 years and you have to do them again.

    I'll have to wait for a weekend To pull plugs out and check for coolant.

    I'm almost tempted to cost finance on a D4....

    Craig
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