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Can low coolant sensor keep car from starting radiator is full but light is still on

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Low cooland will not keep you eng from starting ,the low coolant indicator sensor may fail but wont keep your car from starting ,you have other elctrical problem it might also make the low coolant light stay on i would have someone qualified in electrical to check it the car dont start due to no fuel or no spark to ignition

Posted on Aug 28, 2010

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Why is my1997 chevy lumina low coolant light is on and the radiator is full of coolant ?


In most newer chevys, the coolant reservoir is part of the pressurized system. Rather than just holding overflow coolant and relying on the radiator pressure cap to draw from and expel to the reservoir, it is an active part of the cooling system. On these systems, there is a coolant level switch in the reservoir. This will activate if the level in the reservoir gets below a certain point. So it is possible to have a full radiator and still get a low coolant light. Be advised that as the reservoir ages and get stained, it is not uncommon for the low coolant sensor to give false indications of low coolant.

Sep 06, 2014 | 1997 Chevrolet Lumina

1 Answer

Why is the low coolant light flashing?


The low coolant light is operated by a level sensor located in the coolant reservoir itself. If the low coolant light is on and the coolant level is full then wither the sensor is unplugged or the sensor is bad.

Aug 23, 2014 | Cars & Trucks

1 Answer

Overheating


OVERHEATING CAN BE CAUSE BY MANY THINGS LIKE FAULTY THERMOSTAT AND FAULTY RADIATOR PRESSURE CAP,TOO MUCH WATER IN COOLANT SYSTEM NEED 50 / 50 WATER AND ANTIFREEZE.LOOK FOR WATER PUMP WEEP HOLE LEAK, IF COOLANT LEAKING OUT WEEP HOLE WATER PUMP BAD NEED REPLACING.CHECK FOR LOW COOLANT LEVEL, YOUR RADIATOR OVERFLOW JUG SHOULD HAVE COOLANT AT THE FULL COLD MARK IF NOT KEEP ADDING COOLANT INTO COOLANT OVERFLOW JUG UNTIL COOLANT STOP DROPPING AND FULL COLD MARK, IF OVERFLOW COOLANT JUG WAS EMPTY RADIATOR IS LOW ON COOLANT.WHICH CAUSE AIR IN COOLANT SYSTEM KEEPING THE ENGINE COOLANT TEMPERATURE SENSOR FROM BEING SUBMERGE IN HOT COOLANT WHICH TURN ON THE COOLANT FANS.WHEN ENGINE COOLANT TEMPERATURE GET CERTAIN SET TEMPERATURE LIKE 190 DEGREES THE PCM AND COOLANT SENSOR WILL TURN ON COOLANT FANS, IF VECHICLE OVERHEATING COOLANT FANS NOT WORKING EITHER YOU HAVE FAULTY ENGINE COOLANT TEMPERATURE SENSOR CHECK COOLANT FANS FUSE AND RELAYS. YOU CAN CODE SCAN CAR TO SEE IF YOU HAVE FAULTY PCM, FAULTY ENGINE COOLANT TEMPERATURE SENSOR OR FAULTY COOLANT FAN RELAY.IF COOLANT FAN AND ENGINE COOLANT TEMPERATURE SENSOR OKAY,YOU HAVE CORRECT COOLANT LEVEL IN COOLANT SYSTEM, THERMOSTAT AND RADIATOR PRESSURE CAP BEEN REPLACED, YOU COULD HAVE BLOWN HEAD GASKET CHECK ENGINE OIL LOOKS LIKE MILK SHAKE HEAD GASKET BLOWED ALSO WHEN HEAD GASKET BLOWED YOU CAN DRIVE CAR SHORT DISTANCE START OVERHEATING AND YOU LOOSE ENGINE POWER SUSPECT BLOWED HEAD GASKET.

Aug 04, 2011 | 1999 Oldsmobile Alero

1 Answer

1998 buick century low coolant light keeps flashing after I filled overflow container-radiator is full


Change the low coolant sensor. It is located on the radiator. It might be a good idea to get the radiator flushed too.

Feb 16, 2011 | Buick Century Cars & Trucks

1 Answer

Just bought my 2008 Chevy Impala and I love it except when I use the remote start or just start normal, it does not heat up unless I am driving down the road. It blows cold air until i drive. Is this...


You may be low on coolant - or have an air bubble in the heater core! Make sure you have the right antifreeze and mix 50/50 with water. Start car, turn heater on max heat full blast and fill reservoir with coolant. If you have access to the radiator cap I would fill from there. This is a pressurized system, so it may blow some coolant out at you. Squeeze upper radiator hose to ensure it is full, cap radiator and now recheck the reservoir. If this doesn't help, you'll need to raise the front of the vehicle so the radiator cap is above the heater core hoses. Remove cap, start engine with heater and blower on high and fill radiator. Cap radiator before you lower the car and you should be good. Keep an eye on the coolant reservoir as you may have a leak which would cause the low coolant symptom. You also have a sensor to tell you is you are low on coolant. If you are and it is not lighting up, you may want to have it ( the sensor) tested and replaced.
Good luck!!

Nov 17, 2010 | 2008 Chevrolet Impala

3 Answers

Low coolant light won't go off, coolant level is just fine, how do I reset the light?


The light should reset itself after a few on/off cycles of the ignition, if not you may have a bad low coolant sensor.

Jan 19, 2010 | 1999 GMC Sierra

5 Answers

Low collant light is on and has no leak and is full


This problem is common, if the coolant level is OK, check the "coolant sensor" and clean the plug.

Aug 28, 2009 | 1995 Buick Park Avenue

2 Answers

Low coolant light is on with full radiator


Check the coolant top up reservoir. Low coolant sensor is usually in the overflow/reserve container.
Wash out and clean any dirt or corrosion from the sensor prong.
Refill to correct level with fresh coolant, then recheck alarm operation.

Jul 17, 2009 | 1997 Pontiac Sunfire

1 Answer

Flashing low coolant light


there is a coolent sensor at the top of the radiator replace that sensor that will fix the problem.

Jan 11, 2009 | 1991 Buick Regal

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