Hi I had code 89 for a while, cooling fan would start after I parked up but coolent seemed OK. Very confused about code 89. Anyway my car over heated and the head gasket had blown, somewhere there had a faulty pipe and coolent leak. Since now fixed. With new gasket. Plugs. Timing belt. Battery. Oil and filter change.. the 89 code has now started up again after one day back on the road. What is this 89 code any ideas please..