Question about 2004 Chevrolet Impala

4 Answers

COOLANT TEMP GUAGE NOT WORKING PROPERLY (GM 3.4L V6 F.I.)

TEMP GUAGE IS INOPERATIVE. I TOOK THE CAR TO A DEALER WHO TESTED; P0118 THE COOLANT SENSOR (FAILED-EXCESS RESISTANCE), COOLANT GAUGE SWEEP TEST (PASSED).

THEY REPLACED THE TEMP SENSOR (RETESTED-OKAY). THEY TOLD ME THAT A CODE, P0128, INDICATING THE THERMOSTAT WAS NOT ACHIEVING THE PROPER ENG. TEMP. I WAS TOLD THE THERMOSTAT HAD TO BE REPLACED FOR THE GAUGE TO MOVE. THE THERMOSTAT REPLACEMENT COST APPROX. $400. I DECLINED.

IT MAKES NO SENSE TO ME. AN ANALOG GUAGE SHOULD MOVE GRADUALLY FROM DEAD COLD TOWARD HOT TO INDICATE THE TEMP AS THE CAR HEATS UP AS LONG AS THE TEMP SENSOR IS WORKING.

AM I BEING SCAMMED? I CAN UNDERSTAND THE SERVICE ENGINE SOON LIGHT COMING ON IF THE THERMOSTAT STICKS OPEN BUT THAT SHOULD NOT AFFECT THR OPERATION OF THE GUAGE. MY HEATER PUTS OUT SO MUCH HOT AIR I HAVE TO TURN DOWN THE CONTROLS.

JACKTHEBEAR

Posted by on

  • jackthebear Jan 22, 2009

    I DISCONNECTED THE BATTERY TO "RE-BOOT" THE COMPUTER BUT THAT FAILED TO RESOLVE THE PROBLEM.

×

4 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 2,920 Answers

It very well could be the thermostat....even though you get plenty of heat etc it could be stuck open allowing the water to get through..i dont think youre being scammed but you can either do the thermostat yourself or find a cheap shop to do it for you for about 75.00 or so. thats the one thing about going to a dealer....they are high on everything they do and charge an arm and leg for the little things like this just to get the money from you. but yes it could be the thermostat causing the problem no doubt.

Posted on Jan 22, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 716 Answers

Temp Sensor Would Explain The Gauge Not Working But The Thermostat Not Working Properly Would Only Affect The Gauge To Run Hot Usually. Go Get Yourself A Good Radiator Flush And See If That Doesn't Fix You Right Up.

Posted on Jan 22, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,450 Answers

Your gauge will work regardless of the thermostat. your engine light will come on if car is running to cool since it is designed to run at a certain temp. but if your coolant sensor was bad it would set this code along with the sensor code have sensor replaced and clear codes see if thermostat code comes back on

Posted on Jan 22, 2009

  • TripleTauto
    TripleTauto Jan 22, 2009

    on newer vehicles unhooking battery will not always clear codes.

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,990 Answers

Welcome to Fixya! After reading the Past posts, You have a Bad Temp Guage. This may require the Guage Cluster to be Replaced. They do stop working after a Few Years. There is also a Temp. Sending unit that has 1 Wire coming up from the Block on the Motor that still could cause this Problem.

Posted on Jan 22, 2009

  • Travis Humphries
    Travis Humphries Jan 22, 2009

    Yep, That will not get it in this case. Do you have a Salvage around your city where you can get a Guage or Cluster to chech this with????

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Code p0118 keeps coming on and the parts have been replaced


P0118 engine coolant temp circuit high input
Possible causes
Low coolant level
Bad coolant sensor
Bad thermostat
Broken wire or poor connection at coolant sensor harness

May 21, 2016 | 2000 Ford Escort

1 Answer

What can cause trouble code p0118 engine coolant temp sensor ( high voltage input ) 99 intrepid 2.7 v6


The engine coolant temperature (ECT) sensor is a variable resistor, that measures the temperature of the engine coolant. The ECT sensor has a signal circuit and a low reference circuit. The engine control module (ECM) supplies 5 volts to the ECT signal circuit and a ground for the ECT low reference circuit. When the ECT is cold, the sensor resistance is high. When the ECT increases, the sensor resistance decreases. With high sensor resistance, the ECM detects a high voltage on the ECT signal circuit. With lower sensor resistance, the ECM detects a lower voltage on the ECT signal circuit. If the ECM detects an excessively high ECT signal voltage, which is a low temperature indication, DTC P0118 sets. You have A bad coolant temp sensor or a wiring problem !

Aug 05, 2015 | Cars & Trucks

1 Answer

Temp guage not showing engine temp


it's possibly a bad thermostat. Or Coolant temperature sensor is bad or not correctly grounded. If coolant level is ok. Then check for a bad coolant sensor first! or problems in your wiring harness, or your temperature gauge is inoperative. Good-Day!

Sep 10, 2014 | 2009 Chevrolet HHR

1 Answer

2001 CHEVY VENTURE TEMP GUAGE KEEPS GOING UP AND DOWN, THE FANS ARE WORKING AND I FLUSHED THE SYSTEM AND THE COOLANT IS CIRCULATING. COULD IT BE A RADIATOR CAP OR COOLANT SENSOR? ANY THOUGHTS


there is a very common problem with all GM cars and trucks ,and that is the intake manifold gasket leaks. have the motor pressure tested. here is a picture of a bad intakr gasket I did last week 1_3_2013_9_44_07_pm.jpg

Jan 03, 2013 | 2001 Chevrolet Venture

1 Answer

Engine almost stalls when blower is turned on.


Well the code means the coolant temp sensor is telling the computer the engine is very hot or overheating. And that would cut the engine off for safety reasons.
Assuming the radiator is full of coolant, the sensor would need to be tested with a scanner to see if it is actually working.

Sep 22, 2012 | 2003 Chevrolet TrailBlazer

1 Answer

I have a 98 cevy astro that i replaced the engine coolant temp sensor and i cleared the code after i started the van and ran it for a bit the code (p0118 engine coolant temp circuit high input ) came back ...


Hello! After you changed the sensor did you also replace the coolant? If so, It is necessary to bleed air from the cooling system or The ECM will set code P0118...If not check the connector wires...Black and Yellow for corrosion and/or broken/loose connections...See resistance to temperature chart...When engine is cold resistance of the CTS is high...when hot resistance is low...This will tell you if the sensor is working properly.............Guru...........Saailer

deg F deg C resistance (ohms) 210 100 185 160 70 450 100 38 1,800 70 20 3,400 40 4 7,500 20 -7 13,500 0 -18 25,000 -40 -40 100,000+

Oct 20, 2010 | Cars & Trucks

2 Answers

The temp light on my volvo s70 keeps lighting up. the guage doesn't go any higher than midway up the guage, but the coolant reserve now has a crack and the excess coolant is steaming out of it.what can i...


the only reason coolant would be steaming in the reservoir is if it were steaming out of the radiator into the reservoir. consult local technician to see if your engine coolant temp sensor is operating properly; most likely a bad engine temp sensor.

Oct 06, 2009 | 1999 Volvo S70

1 Answer

Temp guage dont read


U are talking about two different sending units, one is the Engine Coolant Temp sensor, the other is the temp guage sender, sounds like you have a bad thermostat, if the engine doesn't reach the proper operating temp it will set a code for the engine coolant temp sensor, and the guage will not move or move very little, replace your thermostat and both problems will go away.

Mar 02, 2009 | 1996 Pontiac Grand Am

Not finding what you are looking for?
2004 Chevrolet Impala Logo

469 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

60960 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...