Question about 1999 Cadillac DeVille

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Coolant Low Indicator is shown with normal temp indicated

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Check the wire/connector on the coolant level switch which is located under the coolant refill reservoir:


Coolant Low Indicator - eedd705.gif

Posted on Apr 29, 2010

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Posted on Jan 02, 2017

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Check engine light flashes only til I reach 30 mph, slow while acceleration, engine temp fluctuated from normal to low on temp gauge, engine rpms seem to drop lower than normal? What is wrong here?


the lowering on the temp gauge indicates a lack of coolant around the bulb of the temp sender unit or a lack of flow around the cooling system
could be from low coolant level or blockage in the coolant system from forming ice ( 16 degrees is -8 degrees Celsius which is below freezing point of water)
I suggest that you check the antifreeze ratio in the cooling system and it should be no less than 50/50 to water
any thing less than 50 % antifreeze in the water will allow the coolant to freeze up which may be your problem
coolant condition should be checked every season as it does deteriorate over time and the % ratio will drop
topping up with normal water is another method of lowering the % point
check with a radiator shop or dealer service center to get the correct % of antifreeze for below freezing conditions and keep it at that point

Dec 20, 2015 | 1999 Toyota Camry

2 Answers

I have 2006 Chevy impala 3.5l and it's slightly overheating and I just recently changed the water pump and thermostat but it didn't change, and when I turn my heater on the air flow is very low.


check the lower (suction) radiator hose that it cannot collapse, they usually have a metal coil inside to prevent this. If you left this out when installing the water pump it could be the cause..What temperature is the gauge reading? You could have been running too cool before and now that the new thermostat is in its up to normal temperature.

Low airflow through the heater is a separate issue and can be caused by leaves in the ductwork, a blend door not opening/closing fully, clogged heater core (are you a smoker?) Good luck.

Edit: I had another thought on this.. the cooling system needs bled carefully, air in the system can cause symptoms like you describe, look for a bleeder screw on top of the engine somewhere and make sure to let the air out of the system.

Jun 27, 2015 | Cars & Trucks

1 Answer

Temp gauge in 98 pontiac wont work is there a fuse for it


Hi Tammie, Is the coolant level low ? If not , The engine coolant level switch grounds the indicator with the coolant level in the coolant reservoir below the minimum recommended level. The engine coolant level indicator module is on the right side of the radiator just down below from the radiator cap !
Low Engine Coolant Indicator Always On

Step

Action

Value(s)

Yes

No

1

  1. Disconnect the engine coolant level indicator module connector.
  2. Turn the ignition switch to the RUN position.

Is the low coolant warning indicator ON?
--
Go to Step 2
Go to Step 5

2

Inspect for a short to ground in CKT 68.

Does a short to ground in CKT 68?
--
Go to Step 3
Go to Step 4

3

  1. Repair the short to ground in CKT 68.
  2. Inspect the system.

Is the repair complete?
--
System OK
--

4

  1. Replace the instrument cluster. Refer to Instrument Cluster Replacement .
  2. Inspect the system.

Is the repair complete?
--
System OK
--

5

  1. Replace the engine coolant level indicator module. Refer to Coolant Level Module Replacement in Engine Cooling.
  2. Inspect the system.

Is the repair complete?

Feb 01, 2015 | 1998 Pontiac Grand Prix

1 Answer

2004 explorer 4.0 coolant reservoir boils over when stabolized at normal level, no heat when level drops temp indicator normal


go to autozone rent the free tool called a block tester buy the fluid for it (about $8.00 us)drive the car make sure the resivour is about 3 inches down so you dont suck any fluid into block tester. pour blue fluid into block tester put it in antifreeze resavour. squeeze bulb sucking air from resouivour for up to 2 minutes if fluid turns yellow your head gaskets are leaking. I think you may find this to be your problem

Feb 12, 2013 | 2004 Ford Explorer XLT

1 Answer

2006 impala. indicator light says "engine hot, A/C off". but temp guage is showing it is cold


cold or normal temp? Check coolant level. if the level is low, the temp sensor cant read correctly

Nov 30, 2010 | Chevrolet Impala Cars & Trucks

1 Answer

My volvo 850 gets hot but the indicator of temeperature works and shows that dhe temperature is in normal levels, also dhe radiator signals lights on.


The radiator signal lamp is on because the coolant level is low (there is a leak somewhere). The temp indicator doesn't show hot because the sensor probably has no coolant flowing past it to sense the temperature. This should be repaired as soon as possible before the head gasket needs to be replaced.

Mar 23, 2010 | 1994 Volvo 850

1 Answer

2007 ford expedition makes sound like if it was running hot, but temp. indicator stays a little bit below normal. Air conditioner stops working when making this sound.


Hi,

First, DO NOT open coolant system while vehicle has been running...Danger of sclading

Make sure radiator fluid is at its proper level. vehicle being low on coolant can cause this problem.

If coolant was low (indicates a leak in radiator system); suspect a leaky radiator cap, coolant reclaimer, or bad radiator hoses.

If the problem appears to be anything other than low coolant, or a leaky radiator cap (cheap checks); it's very easy to start chasing your tale on coolant issues, and too expensive to be second guessing. Best thing at that point would be to go to a local trusted mechanic.

Water pump could also be leaking; but not likely since the vehicle is too new.

HTH,
Mike...


Nov 30, 2009 | 2007 Ford Expedition Eddie Bauer EL

1 Answer

What is the check gauges light


CHECK GAGES light (1) indicates a potential engine failure(low oil pressure, low coolant, coolant overheating) has occurred.
· Check gages and shut down engine. Gages should read as follows: Oil pressure 5 to 10 psi (34 to 69 kPa) at idle; Water Temp gage below 230 degrees (110 C).
· Check engine oil level (Para 2-11) if OIL PRESS gage indicates low reading. Check coolant level (Para 2-11) if Water Temp gage indicates high reading. Notify Unit Maintenance if levels are low.

If CHECK ENGINE light (2) is on, check engine oil pressure gage (3) and water temperature gage (4). If both indicate normal, proceed with mission and then notify Unit Maintenance. If either one does not indicate normal, stop engine immediately and notify Unit Maintenance


Oct 16, 2009 | 1999 GMC Jimmy

1 Answer

1997 2.4L Chevy Cavalier LS; Low Coolant Indicator and Temp Gauge


take the cap off of the radiator (whil engine is cold) start and run the vehicle. keep runnig 30mins after the vehicle is hot keeping notice of the rad fluid level.
keeping the cap off will prevent the pressure build up that woiuld keep the air in the system, keep adding water or antifreeze as the level goes down. this may take an hour or so.
also with the cap off, you will be able to see if your water pump is operating correctly. you will visibly be able to see movement in the rad when the pum is engaged.

May 26, 2009 | 1997 Chevrolet Cavalier

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