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When it comes on the engine jumps momentarily but then drives reasonably ok. It can stay on momentarily or for minutes at a time. The Engine management light comes on randomly (can be from cold or whenever it feels like it). First it was just momentarily, a coupl eof times a week, but has now developed into a more permanent indication.
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Over the past couple of weeks my Engine management light has started to come on. same symptoms.same result,only different coloured earth,like i said i wouldn't touch any wiring unless i was 100% sure,i wasn't and neither where nobody on here could give me the answer to my question.So the reason i took it too the garage was they where able to identify 100% the correct earthing wire using autodata.Īlso wouldn't say a earthing problem was a grave concern on a 5yr old car,when you get camshafts snapping on the same aged make of cars with low miles.mine resulted in a easiery and cheaper fix,than a snapped camshaft.Anyway all is resolved and iam happy.Moral of the story is.dont be put off by those who proclaim to know better than you.when infact they are really dont have the answers and are really non the wiser.I have a 1.8 Vectra (yr 2000) with an XE1 engine. Wasn't a million miles away with my diagnosis,i asked which Maf wire was the earth,it is yellow on the astra/vectra,the Maf earth wire on the corsa is blue,same code.same fault. I know there have been similar problems with some astras and vectras,and that you can re earth the the maf,i have had a look at the wiring to the maf and there are 5 wires blue,red,white,yellow and green,i know on the astra and vectras the yellow wire is the earth,can any one tell me if this is the same for the corsa?. Not really.snipit of the start of my OP.Quote.
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Vauxhall astra mass air flow sensor problems full#
Took it in to the local garage first thing where all the vehicles from work are serviced and looked after,explained to Mark the mechanic,who put it through there own diagnostics.He came up with the same code p0100,he then went on autodata and tested all the wiring from the ecu to the maf testing resistance & volts,when idling it should show 1.3 volts,but was only showing 0.6,also at full throttle should of increased to 4.2 v,reading wasnt hardly increasing at all.After lots of other checks on the ecu pins.A new earth feed was run from the maf earth to a new earthing point.Result EML cleared,car is ticking over around a steady 900rpm,and the throttle response is instant,just been on 20mile round trip,and car is transformed,and pulls like a train now,So looks like the fault was down to poor earthing on the maf like the vectra & astra earthing faults when giving a p0100 code. 0 volts/5 volts/0 volts/14 volts/5 volts seems a bit erratic, anyone have any ideas, any help would be appreciated.Thanks in advance I know there have been similar problems with some astras and vectras,and that you can re earth the the maf,i have had a look at the wiring to the maf and there are 5 wires blue,red,white,yellow and green,i know on the astra and vectras the yellow wire is the earth,can any one tell me if this is the same for the corsa?ītw tried a multi meter on the plug to the maf and get the following on each of the five pins. My 55 plate sxi 1.2, only done 19000mls and has code p0100,so decided to replace the maf with another new bosch one.Still same problem,Car drives fine at first, then when its switched off,EML light comes on when started again on 1st start or sometimes 2nd,revs drop to about 500rpm on tickover and is very jerky at low revs,i can clear codes again,then its ok (though tick over is still jumps between 500&700rpm) and performs fine till i switch off and back on EML is on again. Vauxhall Corsa C - Mass Airflow problems 2005 1.2 sxi - Big I