antmashed
Member
Registered: 2nd Aug 06
Location: Hertford
User status: Offline
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it keeps coming on then off and on again
what can it be ?
is it a problem?
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Marshall
Member
Registered: 10th Nov 05
Location: Boston, Lincs Drives: 1.4 Sport & 2.2 astra
User status: Offline
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its recognising a fault. If it stays on for longer than 30 seconds it should store the fault code iirc. get it checked at vaux or you might be able to do a paperclip test depending on the. model/age.
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Warren G
Member
Registered: 14th May 06
Location: Kent
User status: Offline
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since your head gaskets gone, maybe o2 sensor
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Poot
Member
Registered: 30th Jan 05
Location: Wales/midlands drives: 1.6 16v
User status: Offline
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mines doing this too, only noticed it quite a bit since I changed the head gasket on mine?
Stays on for about 20 secs when driving at about 50mph, then goes off 
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antmashed
Member
Registered: 2nd Aug 06
Location: Hertford
User status: Offline
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02 sensor?
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Warren G
Member
Registered: 14th May 06
Location: Kent
User status: Offline
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possibley - due to the coolant in the exhasut fucking it up
or might not
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