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Thread: Spanner light at low revs?

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    Regular Member ChrisFox's Avatar
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    Unhappy Spanner light at low revs?

    Hi all, I am new to the forum, just discovered the website yesterday!
    I have a 2003 53 Vectra 2.2DTI SXI. Recently I have noticed an intermittent annoying problem, and am wondering if anyone has any advice.
    Sometimes when driving along, if I am in a high gear but at lower revs, for no reason the spanner light comes on and the car drops to half power and I can't go over 50mph. If I stop, switch off then back on the car is fine again. I have taken it into the local vx garage, but apart for telling the light had been on (I could have told them that!) they could not find any faults.
    Has anyone experienced this, or know what it is?

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    Regular Member m8internet's Avatar
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    Sounds like the engine is going into safe mode, restricting the revs to about 1500 rpm to prevent engine damage
    This is normally caused by cranshaft sensor failure, but that should be logged on the ECU and read on TEC2
    if the VX dealership can't read and diagnose the fault, wait until the fault reoccurs and try a different dealership

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    Regular Member parapaul's Avatar
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    I thought the fault codes were stored on the ECU for the next 25 starts, or something like that, and only cleared if the same fault doesn't happen again within that time.

    So the dealer should be able to find something....if they actually looked.

    And yes, it sounds like limp mode.

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    Regular Member Gsi3.2's Avatar
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    Quote Originally Posted by parapaul View Post
    I thought the fault codes were stored on the ECU for the next 25 starts, or something like that, and only cleared if the same fault doesn't happen again within that time.

    So the dealer should be able to find something....if they actually looked.

    And yes, it sounds like limp mode.
    You are quite correct.. if the EML comes on, it is stored for a period..Tech2 will be able to read it, but it does depend on the skill of the operative..

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    Regular Member Caterman's Avatar
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    Vehicle : Signum

    Trim : Elite

    Engine : 3.2 V6

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    Quote Originally Posted by Gsi3.2 View Post
    ......... but it does depend on the skill of the operative..
    .....and we all know what most of them are like Mark

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    Default Spanner light at low revs

    Hi Chris,

    Just reading your problem with the spanner light at low revs. Did you ever fix it?

    I've got a 03 plate 2.2DTI SRi and have had the same problem recently. When I towed my caravan at low revs the light comes on, so I have to keep it about 2000rpm.

    I've also noticed now, that some times it come on when it's on idle, but then goes off again.

    I've spoken to the VX dealer, but they said there's no guarantee that they can fix it, unless it stays on all the time.

    Regards

    Paul

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