Question about 2003 Nissan Altima

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I have a 2003 altima the temp gauge is running cold and the check engine light went on What can the problem be?

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Just run it by auto zone and they will hook it up and read the code for you for free.

Posted on May 13, 2010

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Why is my 2003 impala running cold when i run the car it never reaches it's normal temperature


It is likely that the thermostat is stuck open. Remove and replace. They are very inexpensive.

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Its telling you there's something wrong Tom!!
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I have a 2003 alero with the v-6 what happened was driving down the road the heater works fine. then all of a sudden it was blowing cold air and the temp gauge started climbing. it started blowing how air...


Sounds like the water pump is cavitating . Replace water pump. Check coolant level also. Open the bleeder valve usually located on thermostat housing to remove air from system. close valve when coolant is present while filling. close radiator cap and top off recovery bottle to correct level. These engines are prone to overheating, do not let temp gauge get in the red.

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Jan 28, 2013 | 2003 Nissan Altima

1 Answer

Heater donot get hot whil running


It could be a plugged heater core or heater control problem. I assume the blower is working, but the air is cold. The first thing to check is the coolant level, make sure there is coolant in the resivoir. Next see if the temerature gauge reaches the normal operating temperature range. If the gauge reads cold most of the time, it would tell you that the thermsotat is faulty and not allowing the engine to reach full operating temperature. If your car doesn't have a temp gauge, the blue cold engine light might stay on for an extended period of time. The thermostat is supposed to not allow coolant flow in the radiator until the engine reaches operating temperature. If you drive the car for a couple of minutes, from cold start, the radiator or upper hose should be cool until the engine reaches operating temp.

Mar 15, 2011 | 2003 Volkswagen Beetle TDI

1 Answer

I was driving out 2003 thunderbird yesterday and about 5 minutes after I left home the overheat light came on and then the engine light. It started to run rough so I immediatley went home. The guage of...


u need to take somewhere and have codes scanned (most parts store do this for free) my best guess is it probably a bad coolant temp sensor (u have 2 of them one for gauge and one for computer) one that probably bad is one for computer (should be one with two wires)(one with one wire is for gauge) if temp sensor is reading that the motor hot it will adjust air/fuel ratio for a hot motor but if motor is actually cold it run bad
But to know for sure u need to at least get codes scanned

Jun 28, 2010 | 2003 Ford Thunderbird

1 Answer

I have a 2003 volkswagen jetta, no owners manual, outside temps have been really cold, below the temp gauge a temp light comes on and a chime sounds, temp gauge runs fine, had a friend ck coolant, it...


does it do this first thing when its cold out ?? if so, fill the coolant res to the max line when cold, if light still comes on, it could be either the coolant leven sensor (my guess) or the temp sensor for the engine- these are known to go bad every few years

Dec 11, 2009 | 2003 Volkswagen Jetta TDI

1 Answer

No heat ..help installed new heater switch, replaced water pump..replaced coolants, and thermostat......................what else could it be? Nissan 2003 GXE Sentra 1.8 L Engine/...


you could have an air pocket in the cooling system that has to be burped. With a cold engine, park uphill and leave the radiator cap loose. Fill radiator and coolant reservoir. Start engine with cap loose and run at 1500 rpm until temp gauge reads normal. Feel if top radiator return hose from engine to radiator is hot. If yes, coolant is flowing and thermostat is open. If cold, thermostat is not staying closed until engine is hot.

report results.

Oct 29, 2009 | 2002 Nissan Altima

1 Answer

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

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