Question about 1993 Toyota Corolla

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I have change the sensor and gauge and still my car temp. gauge moves to the hot zone right away. what elese can it be. I even check the relay is good.

Posted by Anonymous on

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Try disconnecting the sensor. then turn on the ignition switch and see what the guage dose. If it still goes to the top, chances are there is a short in the wiring. If it does nothing, chances are you have a defective sensor.

Posted on Apr 03, 2015

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Check for coolant flow across the radiator by feeling the bottom hose of the radiator, if the hose stays cool the thermostat may be stuck shut, if the hose gets hot then the cooling fan is not working or the coolant level is low.
If the bottom radiator hose gets hot, the radiator cooling fan works, the gage circuit has a problem if the engine is within normal operating temperature but if the engine is geting hot and the gage reads correct, there may be an engine problem.

Posted on Apr 03, 2015

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  • Expert
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Possibly the radiator is blocked. Flush the radiator. When was last time this was done?

Posted on Apr 03, 2015

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MNfisherman
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SOURCE: 2003 Toyota Rav4 low voltage

Did you have the computer reset after the part was changed? That is what you need to do. It may also take some time for the computer to relearn everything. Was it a bad maf sensor or a probem in th circuit itself? There is a difference. If it was just the sensor and you replaced it, then reset the computer and let it relearn. Make sure your charging fuse and relays are good as well as making sure the ground cables and battery cables have clean connnections and are tight.

Posted on Oct 11, 2010

sidebarr2
  • 166 Answers

SOURCE: The temperature gauge shows very high even the car

The radiator on thoses older ones clog at bottom useally the first 3 or 4 lines and this causes the mysterious over heating,,,,,I had this same problem on a 89 camery and a 87 toyota van,both 4 cylinders

Posted on Mar 16, 2011

  • 73 Answers

SOURCE: Car temp gauge reads hot but it doesn't seem to be running hot. I have changed the thermostat, cooling fan sensor and temp gauge sensor, still reading almost hot to the red. The water is flowing throu

From your description, it does not sound like it is actually running hot.
Might be a faulty gauge or computer unit.
I hate to say it, but sometimes worth taking to the dealer to check annoying ones like this.

Posted on Feb 27, 2014

Testimonial: "2000 4 Rav4 temp gauge reading hot. I am a diesel and heavy equipment mechanic I run down and diagnose problems daily. I have been doing this for 32 years. This my nieces car that she just bought 4 days ago. My niece is driving my car I am driving my wife car, and my wife has none. She came on hard times and had to sell her car to pay bills. So she has been driving my car for three weeks now. I have been going with her to teach her what to look for and haven't found a car for her all this time. She did this one on her own, took the flashlight checked for leaks, took it for a test drive, did doughnuts, checked gauges and listened noises seemed pretty good bought it the same day. Now its my problem. Its got me stumped. Give me the good old stuff not this computerized cr..."

  • 7 Answers

SOURCE: temp gauge does not work

there is a single wire connected to a temp sensor on the right side of the engine (pass side) just under the exhaust manifold. A common problem is the wire rests on manifold and burns or shorts out to manifold which results in loss of temp display. find wire, repair and replace on sensor. I found that crimping on a gator clip and attach it to sensor works just fine. another issue not discussed is the plug on the end of the wire gets loose and although it may be on the sensor its not making a good connection. thus why I use the gator clip to ensure connection. The temp sensor by the thermostat is only for the ECM and has no function with the gauges.

Posted on Mar 17, 2014

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1 Answer

Cooling fan relay location


What year is the vehicle ? The cooling fan relays have nothing to do with the temp. gauge . GM had problems with the stepper motors inside the instrument cluster . Hooking up a professional scan tool to check what the PCM - engine computer is seeing from the engine temp sensor . You have duel cooling fans controlled by three relays . Checking to see what the actual engine temp. would be the first step , checking to see if the scan tool can control the cooling fans .
Look on youtube at videos on gm instrument cluster stepper motor problems

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Temp gauge does not work


there is a single wire connected to a temp sensor on the right side of the engine (pass side) just under the exhaust manifold. A common problem is the wire rests on manifold and burns or shorts out to manifold which results in loss of temp display. find wire, repair and replace on sensor. I found that crimping on a gator clip and attach it to sensor works just fine. another issue not discussed is the plug on the end of the wire gets loose and although it may be on the sensor its not making a good connection. thus why I use the gator clip to ensure connection. The temp sensor by the thermostat is only for the ECM and has no function with the gauges.

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Could be the temp sensor or the gauge on the dash is faulty.
Does the gauge go to cold if you disconnect the sensor ?

Jan 22, 2014 | Cars & Trucks

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Temperature needle stays on the hot and doesnt move even when the car is cold?


YOur guage is faulty. Your will need to replace your guage if it stays in the hot position even when your car is off and your key is out of the ignition. If it only rises to hot when you turn the key to the run position, you have a wire between your guage and your temp sending unit that has been gounded out. Usually this happens when a person opens their hood to add oil or perform some minor maintenance on the engine and inadvertantly bumps the sensor or switch or wiring. This causes about 65% of these minor issues people incur, but if it does stay all the way up with your key out of the ignition switch, then you will need to replace your temp guage.

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Over heating on gauge, both fans on rad.


I would say check your coolant level, and change your thermostat. And see if it is high fans or low fans when they come on. There is a fan control relay down on the drivers side frame right under the air box that goes bad too if your fans arent working quite right to check if all else.

Jul 25, 2010 | 1999 Dodge Caravan

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I HAVE A 2007 CHEVY COBALT THE CHECK ENGINE LIGHT CAME ON I CHECKED THE COOLANT TEMP GAUGE THE DIGITAL GAUGE READING WAS ONLY SHOWING THREE BROKEN LINES. I CHECKED COOLANT LEVEL WHICH WAS FINE. ENGINE DID...


I had this problem with a 2007 Chevy Cobalt. I changed the coolant sensor and even though the check engine light went out I still had a reading of "---" on the coolant gauge. The problem is most likely one of three things: a low coolant level, a bad coolant sensor, or the thermostat needs to be replaced. The only other possible thing it could be is a bad BCM (Body Control Module) which in that case you would most likely be having other weird problems.

The Thermostat and the sensor are both very easy to get to and replace. Take off the engine cover by removing the oil cap and they are both to the rear of the engine on the driver's side. They are right next to each other.

Hope this helps!

Apr 14, 2010 | 2007 Chevrolet Cobalt Coupe

1 Answer

I have changed the relays and fuses checked cooling fans which worked when direct power was appied hooked everything back together fans still will not turn on also cooling fan sensor was changed also temp...


replace coolant sensor connector?if so can u get a thermo lazer gun to check the block temp? this will tell u if the gauge is incorect,,,go ahead a bleed all the air out of cooling system and see if that does the trick

Jul 05, 2009 | 2001 Chevrolet Malibu

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Car runs hot


CHECK YOUR RELAY IN YOUR FUSE BOX UNDER THE HOOD ON THE DRIVERS SIDE INNER FENDER. THE A/C AND THE HEATER RELAY ARE SAME. CHECK AND SEE IF THE A/C REALY WORKS BY TURNING ON YOUR A/C SWITCH. THE ELECTRIC FAN SHOULD START RIGHT AWAY. OTHERWISE YOU HAVE TO WAIT TILL THE ENGINE ACHEIVES OPERATING TEMP TO KICK THE FAN ON. IF ONE DON'T WORK AND OTHER OTHER DOES... SWITCH THE RELAY AND SEE IF IT WORKS. BEEN THERE AND DONE THAT. $9.00 FOR A NEW RELAY AT CHECKER AUTO PARTS.

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