Question about 2005 Chevrolet Impala

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My temperature gage not working on a 08 impala

Computer said engine hot a/c off need to know if it is a temp sensor or what, had all kinds of heat but gage read 0.

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  • Chevrolet Master
  • 5,332 Answers

You will need a high end scat tool to see what the temp sensor is reading and whether or not the logic module in the instrument cluster is getting the correct signal.

Posted on Dec 30, 2012

Testimonial: "I changed the temp sensor and the temp gage works great the car runs great thanks for the info."

  • Kirk Voorhees Dec 31, 2012

    Thanks Jeremy W change the temp sensor and the car is running great

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6ya6ya
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Posted on Jan 02, 2017

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jturcotte
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SOURCE: display reads engine hot a/c

Sounds like your temperature sending unit is bad. If you need instructions for replacing the sensor, please let us know.

Posted on Sep 10, 2010

  • 1 Answer

SOURCE: 2001 malibu 3.1 v6 cooling fans run all the time and temp gage

replace thermostat, this fixed my car, cooling fans keep coolant below temp guage parameters.

Posted on Feb 13, 2009

  • 279 Answers

SOURCE: need to know location of coolant temp sensor in 2003 Impala

Need more info. I see from the location of your post that you have a 2002 Blazer. Do you mean a Trail Blazer? Chevy didn't make a Blazer in 2002. The ECT (engine coolant temperature sensor) is located on the driver's side, front of the engine. (on top) It is between the ECM (engine control module aka the engine computer) and the alternator. You will most likely need to remove the alternator and it's belt to obtain easy access to the sensor. If you need to remove the alternator for access, remember to disconnect the battery's negative terminal first. The sensor has a wiring harness with a connector mounted to the top of it. After you remove the electrical connector, the sensor will screw out using a deep socket and ratchet. You will loose some coolant (antifreeze) during the change, so make sure you have some DexCool antifreeze on hand.
Charlie

Posted on Mar 04, 2009

Sergey2121
  • 46 Answers

SOURCE: COST OF REPLACING A THERMOSTAT ON A 2004 IMPALA

Thermostat itself is like 8 dollars, from Kragen, or Autozone.

Posted on Apr 08, 2009

  • 400 Answers

SOURCE: the sensor reading engine hot a/c off on my 06

Sir,
You are suggested to check if your Mobloil is full and fine in the engine. and check if plugs are not getting Oil.You might have to get you car tuned.

Posted on Oct 17, 2009

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1 Answer

Engine temp gauge not reading and ac will not turn on due to engine hot warning, diognostics say its a sensor, need to know which one and can i do it myself?2003 saturn vue


What diognostics say its a sensor ?????? No diagnostic's ever tell's you it's a sensor . You as a technician would need to prove that by testing electrical circuits , viewing coolant temp sensor . Hooking scan tool and trying to command the gauge with by directional control . The temp gauge not showing any temp. ? No movement ? Engine Coolant Temperature Gage Inaccurate or InoperativeStep Action
Yes
No
Schematic Reference: Instrument Cluster Schematics
1
Did you perform the Instrument Cluster Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - Instrument Cluster
2
Install a scan tool.
Turn the ignition ON, with the engine OFF.
With the scan tool, perform the Lamp and Gauge Check in the IPC Special Functions list.
Does the engine coolant temperature gage move up and down when commanded?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Go to Step 3
3
Replace the IPC. Refer to Instrument Cluster Replacement .
Did you complete the replacement?
Go to Step 4
--
4
Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 2
Would hate for you to replace the coolant temp sensor an find out that's not the problem ! Does the vehicle start an run good ,trans mission shift good ? If so it's not the coolant temp sensor .
Engine Coolant Temperature Gage
The ECM sends coolant temperature as determined by the coolant temperature sensor to the BCM via CAN serial data. The IPC displays the engine coolant temperature with the gage when the BCM sends a class 2 message to the IPC indicating coolant temperature percentage. The engine coolant temperature gage defaults to cold (0°) or below if:
• The ECM detects a malfunction in the engine coolant temperature sensor circuit.
• The IPC detects a loss of class 2 communications with the BCM.
• The BCM detects a loss of CAN communications with the ECM.

Aug 19, 2017 | AC Cars & Trucks

3 Answers

My temperatur gauge shows hot when i turn on the ignition and two fans turns on right away can you tell me whats the prablem is?


Well it can be one of too things the gage or the temp sensor.
its most likely the sensor. The temp sensor is normally mounted with the thermostat housing which is on the top of the engine and has the top radiator hose going to it if you can't see it, try taking off the plastic covers. With the ignition on so all gages are reading go and unplug the sensor the gage should drop back strata way, this tells you that you have the wright sensor there are sometimes 2 one for the gage and the other for cold starting. There is a possibility that the problem may be coursed by a squashed or rubbed throw wire so if you can't make the gage return to cold by disconnecting the wires then start following the wires back along the engine.
I think you will find a faulty sensor is the cores of your problems and should be easy to pick up at any car part place.

May 09, 2014 | 2002 Chevrolet Impala

1 Answer

Temperature gage not working


These cars and their Monte Carlo cousins were notorious for wiring problems with the two wires coming off the temp sensor. Backtrack the wires for about the first 14" off the sensor and you will probably find a swell or a limp spot. When the computer loses this signal the computer doesn't the engine temp.

Nov 24, 2013 | 2000 Chevrolet Impala

1 Answer

Replace water pump, thermostat and temperature sensor on 2004 pontiac aztek still getting hot


have you checked to see if the cooling fan is working properly.if not then it will have to be checked to see if its the fan that is no good,wiring,or a relay.there are 2 temp sensors one for the gage/light and one for the computer to know what the engine temp is to alter engine controls and cooling fan operation.

Jun 14, 2011 | 2004 Pontiac Aztek

2 Answers

My cars heat gauge keeps going up to the hot section, but I don't think the car is actually overheating, I can't smell anything or hear the radiator boiling.


check the real value of the temperature sensor with a scan tool. Compare it withe the value in the gauge. It can be a defective temperature sensor or a damaged gauge...or else the car is really overheating

May 18, 2011 | 2001 Oldsmobile Alero

4 Answers

Temperature gage does not show temp properly, gage jumps all over but engine is not overheated.


if the engine is not over heating then the gage is in need of replacing.

Nov 30, 2010 | 2005 Buick LeSabre

3 Answers

Display reads engine hot a/c off no temperature gauge reading on 2007 impala


Sounds like your temperature sending unit is bad. If you need instructions for replacing the sensor, please let us know.

Sep 10, 2010 | 2007 Chevrolet Impala LS Sedan New Cars

1 Answer

1989 Nissan Maxima Radiator fans and Temp gauge not working.i have a 1989 Nissan Maxima and the radiator fans do not come on. I have replaced the Engine Coolant Temperature Sensor and this did not work....


-The radiator fan will be kick on ONLY when the temperature reach about 190-200. Depend on the sensor that you have now.
You can test it by boil it and hook up a digital multi meter to it.
and make sure use a temperature gage to test with, so you know how hot the water when it kick on.

Good luck
Mai

Sep 11, 2017 | Nissan Maxima Cars & Trucks

1 Answer

Radiator fan running after engine turned off on 98 nissan altima


You need to diagnose the problem. The fan is doing what it is being told to do by the computer. You stated the temp gage on the dash is in the HOT position. Either the engine is very hot and the fan needs to run to remove heat even after it is shut off or the gage, coolant sensor or temp sender is defective. Try running it temporarly without a thermostat and see what happens, you may have bought a defective thermostat.

Oct 06, 2009 | 1998 Nissan Altima

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