This sensor message flashes two or three times daily, fluid level in rad gets low but when topped up it backs up into resovoir and does not return. what do i have to change or do to correct this problem. p.s: new cap and upper rad hose already replaced.
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from your description of the fault, i beiieve that you may have a coolant flow problem or the coolant level is low this happened on my citroen xsara recently and i found out i had a pin hole leak in the radiator as the coolant level drops in the resovoir it reaches a low level sensor that brings on the stop the car red warning light, a tin of rad weld cured my problem. oyher things to also check or change would be the inline flow temp sensor and the thermostat. good luck,hope i have been of some help. AL PERRY
Does your heater blow out hot air? If you get plenty of heat even at idle (after the engine is warm) then you probably have a temperature sensor issue. If you don't get plenty of heat you either have low coolant or a thermostat issue. Check the level of your coolant when the engine is cold, it should be at the cold fill level that is marked on the resovoir. If it at the correct level, check for flow in the rad if it has a cap. DON'T OPEN IT WHEN THE ENGINE IS HOT!!!! Open if before you start the engine. Watch for the coolant moving through the rad, also (with the cap on and engine hot) both rad hoses, one should be a little cooler than the other. If they are both cool you have restriction in the cooling system. Hopes this helps, I am a former Ford master technician. If you need more help put a new question in Help me, Billy along with an email and I'll contact you with help.
this sounds like a low coolant warning light check the coolant level in the rad and the overflow bottle.these also have a problem with the low coolant level sensor.usually located in the rad below the rad cap in the rad side tank.
First thing to check would be your coolant level in return bottle and radiator when engine is cool. Remove rad cap, and start engine and turn heater on, and see if level in rad goes down, or is low and if yes, top it up while engine running. Allow engine to get up to normal operating temperature and top up as needed while watching it. Allow rad fan to come on and off a couple of times then put rad cap back on, then top up return bottle to proper level. If level is up and you don't need to add any, then I'd start by changing thermostat. Be sure when re-filling system after changing thermostat, to start car and turn heater on while re-filling, and allow plenty of time with cap off to bleed any air out of system. I normally allow fan to come on and off 2 or 3 times to be sure. Then put rad cap back on and top up return bottle to proper level. Something else to keep in mind is that if the coolant level was fairly low when you first check it, is why was it low? Keep an eye for any coolant dripping down on driveway, or engine, and be sure to check return bottle level often for next few days in case of leak in system.
CHECK COOLANT OVER FLOW RESERVOIR MAKE SURE IT HAS COOLANT IF YES.YOU COULD HAVE A FAULTY COOLANT LEVEL SENSOR IN THE COOLANT OVERFLOW RESERVOIR. CHECK TO MAKE SURE ELECTRICAL CONNECTOR STILL INTACT.LIGHTLY TAP WITH THE HEAD OF A SCREW DRIVER BELOW COOLANT LOW LEVEL SENSOR BOTTOM OF COOLANT RESERVOIR.IF LOW COOLANT LIGHT GOES OUT COOLANT SENSOR PROBABLY STUCK IF LIGHT STAYS ON COOLANT LOW LEVEL SENSOR BAD.
there is a sensor in the brake fluid resovoir. if the fluid gets low, the brake light comes on. i'd say its borderline low and when you go up a hill it goes below the sensor level. add a little brake fluid to the resovoir and see if that helps
If your coolant level is dropping, I would suggest that you take a good look at the water pump. That is a very common coolant leakage probelm area on your vehicle. I change 2-3 a week.
Hope this helps.