overheating gets hot oil light comes on on 2000 Pontiac Sunfire

it started overheating check enginelight came on changed thermostat no change what could cause this p.s. blows cold air

by in West Milton, OH on March 16, 2010
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
3 answers
ANSWER by , June 13, 2010
If the car is only blowing cold air, you might want to try bleeding the air out of the coolant lines. If that doesn't do anything, the heater core may be plugged.
ANSWER by , March 16, 2010
Some possible causes are waterpump, cooling fan issue, coolant tempature sensor. If your oil light comes on its because your low on oil or past due for a change which should be a separate issue. Inspect for proper operation of fan(s) and if pump is making a squeal type noise replace. Otherwise try cool. temp. sensor replacement. Hope this will fix.
ANSWER by , March 28, 2015
Also, as far as the oil light alone goes, it is possible that the oil sending unit is going bad. I'm not saying that it is likely, but that it is something to keep in mind. They are a pain to change if you don't have the right tools for the job. They should be rather easy if you have the right tools for this job and they aren't very costly either. Never hurts to start cheap.