Question about 2000 Nissan Maxima

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Whats causing temp gauge hand to jump up an down constantly between cold an halfway while driving

However the cars radiator an reservoir are full

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biodiexel

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Check bimetal thermostat faulty or rusty spring inside

Posted on Sep 01, 2014

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Seems to me that you have a problem with the temp gauge sender unit.It maybe a loose or dirty contact or a faulty unit.Check contact.if that doesn't fix it replace sender unit.

Posted on Sep 01, 2014

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spacil

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Couple of possibilities. Could be loose connection(s) on the temp sending unit or on the instrument cluster. Either power or ground. Or you could have air pockets in the cooling system that need to be bled. A temperature sending unit ONLY works when it is immersed in water. When it is in open air it does not work and some will read normal and some will drop to their lowest reading when that happens. I'm not technical enough to tell you why. First thing I'd check is the connection on the temp sending unit. Make sure it's tight and not corroded. If it looks good then check to see if your car has a bleeder valve for the cooling system located on or near the thermostat housing. If it does Google how to bleed the air out of your particular car and your problem will likely be solved. If not you'll need to dig deeper into the wiring looking for loose connections or even a bad sensor. Good Luck!

Posted on Sep 01, 2014

5 Related Answers

Anonymous

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SOURCE: heat gauge on dash always reads cold

either a faulty temp sending unit or a thermastat stuck open assuming all wire connections are good. if heater blows hot id lean towards the temp sending unit. please rate me trying to make a buck

Posted on Mar 19, 2009

Anonymous

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SOURCE: INTERMITANTLY TEMP GAUGE GOES FULL HOT/GAS GAUGE

Hi, you must just change the Gauges because by this you don't know when the engine is getting hot.

Posted on Sep 16, 2009

early93

Brys Cheek

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SOURCE: I have a 2005 nissan altima and when drving it

Thermostat goin out

Posted on May 28, 2011

tisha_fordyc

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SOURCE: temperature gauge in dash rises to high and drops

The temperature gauge goes to hot even though there is water in the bottle

Posted on Jun 22, 2011

CHRIS BRUBAKER

  • 19 Answers

SOURCE: temp gauge over heating no heat through vents cold

You will need to bleed the air out of the system there should be a bleeder where the top hose connects to the engine

Posted on Dec 06, 2011

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2 Answers

I have a 1999 chevy camaro and I need to add coolant. do I add coolant to resevoir only or to radiator only or to both?


If the engine is cool, what you should do is open the radiator cap and top off the coolant in the radiator. Then, fill the reservoir to slightly above the Full Cold level. This will allow for some additional coolant to enter the system since it will probably need more than what you put in the radiator. After that, as long as you keep the reservoir level between the full cold and full hot levels, you should not have to add any additional coolant to the radiator itself.

Dec 07, 2015 | 1999 Chevrolet Camaro

2 Answers

If the reservoir tank is filled with coolant, it is necessary also to fill up the radiator with water or coolant?


Depends. Not usually because as engine heats and then cools when shutoff, reservoir should allow radiator to suck back what it needs. However, if you have just flushed system, or replaced water pump, you should fill at radiator as well. Bad radiator cap that prevents backflow can cause problems as well.

Jun 05, 2015 | Hyundai Accent Cars & Trucks

1 Answer

Why would the coolant light keep coming on when it is full?


Is the reservoir full and radiator and if so check if theirs a sensor on the reservoir if there is a sensor possibly have to replace the reservoir or try and disconnect the sensor and see if light goes out just make sure you have no leaks.

Sep 21, 2014 | 2000 Ford Taurus

1 Answer

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

Where do I add antifreeze


if you dont see radiator cap on radiator.you pour coolant in the coolant reservoir jug until coolant level stay on full cold mark.when adding coolant to coolant reservoir jug when coolant level stop dropping stay at full cold mark.you have correct amount antifreeze in radiator.

Mar 26, 2013 | Cars & Trucks

1 Answer

The proper way to fill radiator with coolant


Wait until the vehicle has cooled down. Make sure the coolant reservoir is not over full. With a rag in your hand, press down on the radiator cap and turn counter clockwise. Gently release downward pressure. Fill with appropriate coolant. This will either be dextron (red) or regular glycol/water (green at a 50/50 mix). Close radiator cap by reversing the instructions above. Top up coolant reservoir. Start vehicle. Bring to operating temperature. Check reservoir to ensure is still full. If not, repeat procedure.

Oct 20, 2012 | 2002 Pontiac Grand Am

2 Answers

Coolant reservoir is overfulling after being driven


It probably got overfilled at some point. There's a max line on the reservoir that you shouldn't fill it over. Coolant expands as it heats up so if there's too much in the system, it's normal for it to overflow.

May 26, 2011 | 2001 Jaguar S-Type

1 Answer

Coolant Light is on even when its to the full line, not overheating but i am loosing coolant overnight and have to replace it


You say "when it's to the full line". If you are referring to the plastic coolant reservoir, that is not an indication of how much coolant is in the radiator. You must remove the radiator cap to check the coolant level and too add coolant. If you are pouring coolant into the reservoir, and the radiator is low, then the coolant in the reservoir is probably being pulled into the radiator after you have driven the vehicle. That doesn't mean you are losing antifreeze. It just means you need to put antifreeze in the radiator.

Jan 02, 2011 | Chevrolet Cavalier Cars & Trucks

1 Answer

What is the fluid reservior near the firewall on the passenger side


The reservoir you are referring to is actually where you fill the radiator. The radiator itself does not have an opening or cap, therefore the reservoir is part of the radiator. It is marked with lines that indicate full hot and full cold.

Jun 20, 2010 | 1993 Lincoln Town Car

1 Answer

After flushing radiator for 1986 Ford Taurus, where do the coolant go? In the radiator or in the reservoir? And Do you have to idle with heat at full blast before adding the coolant?


Put the coolant directly into the radiator until it's full. Start the engine and run it, watching the fluid level. Keep the coolant within one inch of the neck. Fill the reservoir about half way when the radiator is full.

Apr 22, 2010 | 1986 Ford Taurus

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