![]() Since you replaced the coolant temp sensor already, i would go to a place like AutoZone.have them see if P0128 is still there, and also check, the coolant data.if data is reading, -30F, then you have an open circuit in the coolant sensor harness.if it is reading a number under 100F, then I would definitely replace the thermostat, and burp the system. Fill up the radiator with distilled water and run the engine. ![]() This video shows where the radiator drain plug (petcock) is located on a 2001 Oldsmobile Alero. 1 Answer Warning lights remain illuminated, Alero 5 indicator lights stay illuminated after engine is started. If coolant was low, you should fill to cold level and with the reservoir cap off, run the vehicle.if level drops, add coolant to cold level.if level starts to rise above the cold level, reinstall cap.Īn air pocket will not keep the sensor level cold, if anything, it will cause it to overheat, and your gage should rise. Start your coolant flush by draining the coolant / antifreeze that is in your reservoir, then drain the coolant that is in your radiator by opening the petcock or removing the lower radiator hose. P0128 is usually a bad thermostat, or there is a problem with the coolant sensor circuit.bad sensor, open circuit, or bad PCM.rare for a PCM in this case. ( of 2) Average repair cost is 980 at. A proper ratio of antifreeze to water is 50/50 to 60/40, depending on the vehicle. Nothing I can see from the hoses looks remotely wet, and the. Now coolant is pouring out after driving once I park. I just started smelling coolant while I was driving today, and so, I turned the heater on, and the odor of coolant got a lot stronger, so I figure that it is time to remove the heater core, major pita that it is (has to go under the dashboard, an action more. Had the Waterpump and thermostat replaced and it ran fine for a few weeks. 2000 Oldsmobile Alero GL 3. Low coolant levels is all to common - top yours up today. Average repair cost is 980 at 91,250 miles. Too little or even too much antifreeze can dramatically lower the boiling point of the coolant. My 2000 Oldsmobile Alero 2.4l has a repeating coolant leak. Sometimes the stoplight has multiple bulbs in the housing whereas in other vehicles, the 3rd brake light is an LED brake light strip that must be replaced all at once. 1999 Oldsmobile Alero 93,400 mi, Visitor. Im replacing mine right now because its chirping super loud Ive been told the bearing is going out right now. 1999 Oldsmobile Alero 122,000 mi, Visitor. Click the link to the right of each one to learn more. The 2001 Oldsmobile Alero has 26 problems reported for leaking coolant, intake manifold gasket failure. Isnt fixed yet, antifreeze runs right thru onto ground. Do not check the coolant level when the engine is hot, this can result in serious burns. Your reservoir was low.but how low? I don't think you have a radiator cap, you just have the reservoir cap? The following are warning lights and indicators found in vehicles built by Oldsmobile. I believe that is the low engine coolant warning light. Does this vehicle have a v-6 engine if so you probably have intake gaskets leaking and not a headgasket 3.1 and 3.4 also 3.8 is notorious for leaking intake gaskets alot of shops misdiagnoise this problem you see it,s a catch all when you replace headgaskets the intake gaskets are replaced at same time and the problem is fixed but the customer paid extensive labor to have headgaskets replaced that did not need also on your intrigue your low coolant sensor may be located in the coolant tank rather than the radiator have seen in both places.leaking headgaskets usually will show up with overheating issues coolant in oil or oil in coolant a slow leaking headgasket generally will cause a miss to occur when first started and then disappear good luck and hope this helps, sincerely LYNN CRANK does this vehicle have a v-6 engine if so you probably have intake gaskets leaking and not a headgasket 3.1 and 3.4 also 3.8 is notorious for leaking intake gaskets alot of shops misdiagnoise this problem you see it,s a catch all when you replace headgaskets the intake gaskets are replaced at same time and the problem is fixed but the customer paid extensive labor to have headgaskets replaced that did not need also on your intrigue your low coolant sensor may be located in the coolant tank rather than the radiator have seen in both places.Well, the rear defroster has nothing to do with this.that is a separate issue.
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