![]() ![]() Can Too Much Coolant Cause Check Engine Light?Ĭauses Of Check Engine Light Still On After Filling CoolantĬheck engine light still on after the coolant flush is due to the following reasons: 1.Codes Unrelated To The Engine Cooling System Malfunctioning Engine Coolant Temperature Sensor Causes Of Check Engine Light Still On After Filling Coolant.You should have an OBD2 scan tool to pull the trouble codes so that you can find the root cause of the check engine light still on after filling the coolant. But, the cause of the check engine light was something else. So, you filled the coolant and expected that the CEL will go off. You thought that it was because of a low coolant level. Furthermore, there is a possibility that the check engine light of your vehicle was on at the same time when the coolant level was low. If the check engine light is still on after filling coolant, the chances are that the coolant thermostat is stuck open or coolant temperature sensor is faulty. If the level is low, it could be the reason the light is still on. ![]() Before you start to panic, first, you can check if you have filled the coolant to the proper levels in your car. You’re not sure what to do and you’re starting to get a little worried. Given that the coolant is blue, it could be that the cooling system has been adversely affected by the use of a coolant type it wasn't designed for, though I'm not sure if I would blame it for this vehicle's coolant loss woes.You’ve been driving your car for a while now and you’ve noticed that the check engine light is still on after you’ve filled the coolant or have done a coolant flush. I'd recommend cleaning the oil spots and monitoring to see if the stains return in the short term. The power steering reservoir is also a possible culprit. LOW COOLANT LEVEL WARNING LIGHT CRACKIf the oil hasn't been changed recently, there may be a leak associated with the neighboring oil cooler or a crack in the oil filter housing. Given the oil filter housing is in the nearby vicinity I wouldn't be surprised if the stains are the remnants of a recent oil filter change. The reason for this should be obvious, but the consequences of engine damage from overheating is far worse than any impact of using the wrong fluid on the cooling system.Ĭoolant evaporates and leaves a milky-white stain behind that's oil on the radiator hose If the recommended coolant/coolant grade is not available and the coolant level is low, top up the reservoir with distilled water and have the system evaluated by an authorized dealership as soon as possible. LOW COOLANT LEVEL WARNING LIGHT MANUALSIn a pinch, any coolant is better than no coolantĮven litigation-wary vehicle manufacturers will invariably recommend this in owner manuals (paraphrased from my W12 Touareg manual): I am attaching following picture that may provide more hints, because there is fluid exhausted with force from what I think is radiator hose: The coolant is pouring on the street (in this case there could be something dipping below the car)Ĭoolant gets burned together with fuel and goes out through exhaust pipe (not sure what hints are for this case).Īre the any possible root causes that could explain why coolant disappears? I guess there are three possibilities:Ĭoolant is leaking in oil compartment (in this case the oil may become milky) I suppose it is also important to find out why coolant has disappeared. If it is better not to drive around in current condition, can I simply pour in a liter of distilled water to get the car around for a day or so? I guess this would dillute the water:coolant ratio from 50:50 to something like 60:40. If coolant reservoir is not completely empty and low coolant light is turning on only intermittently, is it ok to drive around for a day or so for short trips until this gets properly fixed? Does this kind of job imply also coolant change? if so, then I guess there is possibility that it is not the blue BMW coolant in her car anymore and in this case the coolant should be flushed if its type can't be determined anymore? She got engine gasket replaced outside BMW a year ago. I would be inclined to buy and pour in new coolant, however, after googling around I have few doubts now: Nevertheless, the float stick was still floating and there was still some fluid left inside the reservoir. I checked the coolant reservoir and float stick was slightly below the "low line". In the last few days the "low coolant" light has been intermittently turning on on my friend's BMW X3 (2007 ~70K miles). ![]()
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