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Hi,after having a obd 1 scan and showing my mechanic the result which was 14.ignition signal(IGF1) he worked on vechile and replaced diesel filter,then tried to turn off engine light on dashboard using his obd 1 ,this did not work,then said to me may go off automatically or drive up to 100kms then may switch off.nothing.i was so annoyed after paying him $140 .as I was unhappy went to AA.should I ask him for a refund .he has not helped at all and given me misleading imformation

Hi there,
It is a difficult one as there really needs to be an accurate diagnosis of a vehicle fault before any repairs are carried out. I wouldn't think an ignition fault code would be caused by a fuel filter, but if it was old and dirty with a potential for blockage- then it was possibly a good thing it was replaced in order to rule out a potential misfire issue. However, repairers do need to make sure they diagnose correctly and not just replace parts without cause.