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Thread: self healing limp mode??

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    Default self healing limp mode??

    strange one this guys, hope someone has an idea whats causing it.
    my siggy 1.9cdti (150) had green box on for thousands of miles and she just started going into limp mode when cruising at 70mph, resets ok by switching on and off.
    took box off and seemed to be ok for a while but now doing it again.
    the odd thing is several times ive left it in limp mode i.e on motorway and its recovered on its own while driving along i.e spanner light goes off and power returns and all is ok again??? very odd.
    have changed the two vac hoses front right corner next to vac pump and thought that had cured it but no not that easy.
    car seems to hessitate/misfire slightly around 1500 revs also very lumpy at times at idle.
    have seen people mention MAF for this type of fault but surely if the ecu saw a MAF fault it would not recover by itself??

    bemused to say the least!

    pete mc

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    Default

    Have you had the code's read? I had a similar thing happen with my 03 2.0Dti Vec, on mine it was an EGR fault, more specifically, "EGR flow excessive". When I took the EGR off to examine it I found a couple of lumps of carbon and I guess one had temporarily wedged the EGR open, but then must have cleared and so the EGR was able to close and the EML light would extinguish.

    But like I said, that was on my car/engine, without getting the codes read you are shooting in the dark.

    Tim

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    Default

    First of all I blame the box!

    The facelifts apparently keep checking the faults constantly and after it checks so many times and as long as it is clear of faults it will reset limp mode and you'll have full power again.

    But as above might be worth getting the codes read to see what comes up

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    Default wouldnt have believed this unless I sorted me self

    Well after a few weeks of nashing of teeth due to his limp mode issue it seems I have sorted it and for £9.11!
    which was the price of a new air filter!
    decided to replace filter just as an after thought really but the difference it made instantly was amazing, revving much more freely less throttle etc and after about 500 miles not one limp mode session!
    turns out the filter was a non GM one which I didn't fit (i've only ever bought genuine GM) it must have been fitted some time back when in for a service at a Nationwide place, to be honest it didn't look that grotty, certainly not what you would expect to cause a prob like this but it sure has!
    So saved meself a good few quid I reckon in terms of keeping the old girl out of the stealers!
    Also in last few days had the MAF off the wifes new Astra 1.7cdti which is same one and made no difference so nothing wrong with the MAF on mine!

    pete mc

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