Temperature Gauge - Page 3

Metallman56 · 04-11-2007, 01:49 PM

my themostat is less then 2 years old. i hope its not.

Sprucegagt · 04-11-2007, 02:32 PM

Quote:

Originally Posted by JC_76

Ok I got a friend of mine from work who is a mechanic to clear the code for me free of charge. The needle worked and the fans turned off but that only worked for about 20 minutes. On the way home the temp. would not read any higher than 150 and I was on the highway doing about 65. Then the needle just dropped and the fans kicked in again. I was doing a little more research and thinking it might be the thermostat. What do you guys think?

That may be it. Has the thermostat ever been changed? Have you done a coolant flush lately?

Quote:

Originally Posted by Metallman56

my themostat is less then 2 years old. i hope its not.

Tstat can go at any time. Even brand new pieces can be duds.

JC_76 · 04-11-2007, 03:03 PM

My thermostat was changed a little over 2 years ago at the same time that I changed the LIM gasket.

Sprucegagt · 04-11-2007, 03:08 PM

You may have a thermostat that's opening to soon. But before you do that. Check the wiring to the coolant sensor. Especially the connector pins. There should be no moisture or corrosion. Also make sure that you get 5 volts DC across the connector leads with the switch off and the connector unplugged.

izayn · 11-15-2007, 06:24 AM

Does anything need to be removed to change the coolant temerature sensor?

iceman · 11-15-2007, 06:32 AM

I got mine out w/out removing anything...

But will say this, problem persists.. definitely a wiring problem, just haven't really spent any time to look at it because I don't care much

11-27-2007, 09:50 PM

I have this problem too and have a Palm Pilot based OBD2 scan tool (Dynoscan) that can show sensor outputs etc...

The gauge in the dash shows only 100 but the scan tool shows only one temp sensor and it reflects the right temps even when the dash gauge is reading 100.

If I clear all P0128's out -- the gauge in the dash works immediately. Unfortunately, I don't have any solution except to clear the codes.

Anybody got any ideas why this would happen?

Sprucegagt · 11-27-2007, 10:04 PM

Did you bother to read the thread?

iceman · 11-27-2007, 10:38 PM

Hey Andy, you know where the harness for the ECT comes from?? mine heads up towards the under throttle body area.. it's pretty tight I'm wondering if I pinched it by mistake when replacing the plenum last.

11-27-2007, 10:46 PM

I admit I didn't read it all because I didn't realize there were 3 pages in the thread...I only read one page. Sorry.

Unfortunately, I don't see any solutions here though.

gectek · 12-18-2007, 06:56 PM

the harness goes to the injector/cmp sensor harness under the UIM...it usually gets damaged easily because it is in such a dumb location with a short harness

04-11-2007, 01:49 PM	#41
Metallman56 Bears Fan AKA: Metall Join Date: Aug 2005 Location: Indiana Age: 36 Posts: 3,856 Vehicle: 2001 grand am gt coupe	my themostat is less then 2 years old. i hope its not. __________________ http://www.cardomain.com/ride/209706...am?action=demo So you proved your point about the camaro - condense your sig. - Your friendly Administration

04-11-2007, 03:08 PM	#44
Sprucegagt Schwartz Power! AKA: Andy Join Date: Aug 2002 Location: Ranson, WV Age: 46 Posts: 2,027 Vehicle: 2000 Grand Am GT	You may have a thermostat that's opening to soon. But before you do that. Check the wiring to the coolant sensor. Especially the connector pins. There should be no moisture or corrosion. Also make sure that you get 5 volts DC across the connector leads with the switch off and the connector unplugged. __________________ 2000 Grand Am GT (some day it will be SC/T) Mods: alot

11-15-2007, 06:32 AM	#46
iceman woop woop AKA: Seth Join Date: Aug 2002 Location: Cherry Hill, NJ Age: 41 Posts: 10,528 Vehicle: 97 Blazer - 84 Fiero	I got mine out w/out removing anything... But will say this, problem persists.. definitely a wiring problem, just haven't really spent any time to look at it because I don't care much __________________ --Seth Support GrandAmGT.com sponsors! My Picture Gallery \| GoneDragRacing.com Drag Racing Photos & Videos

11-27-2007, 09:50 PM	#47
BrianV Guest Posts: n/a	Clear the P0128's and the dash temp gauge works! I have this problem too and have a Palm Pilot based OBD2 scan tool (Dynoscan) that can show sensor outputs etc... The gauge in the dash shows only 100 but the scan tool shows only one temp sensor and it reflects the right temps even when the dash gauge is reading 100. If I clear all P0128's out -- the gauge in the dash works immediately. Unfortunately, I don't have any solution except to clear the codes. Anybody got any ideas why this would happen?

11-27-2007, 10:04 PM	#48
Sprucegagt Schwartz Power! AKA: Andy Join Date: Aug 2002 Location: Ranson, WV Age: 46 Posts: 2,027 Vehicle: 2000 Grand Am GT	Did you bother to read the thread? __________________ 2000 Grand Am GT (some day it will be SC/T) Mods: alot

04-11-2007, 03:03 PM	#43
JC_76 GAGT - Newbie Join Date: Jul 2003 Location: San Antonio,Texas Posts: 14 Vehicle: 2001 Grand Am GT Coupe	My thermostat was changed a little over 2 years ago at the same time that I changed the LIM gasket.

11-15-2007, 06:24 AM	#45
izayn Fast like the Car AKA: Randy Join Date: Sep 2003 Location: Jackson, TN and Chicago IL Age: 46 Posts: 229 Vehicle: 2001 Grand AM GT 4dr	Does anything need to be removed to change the coolant temerature sensor?

11-27-2007, 10:38 PM	#49
iceman woop woop AKA: Seth Join Date: Aug 2002 Location: Cherry Hill, NJ Age: 41 Posts: 10,528 Vehicle: 97 Blazer - 84 Fiero	Hey Andy, you know where the harness for the ECT comes from?? mine heads up towards the under throttle body area.. it's pretty tight I'm wondering if I pinched it by mistake when replacing the plenum last. __________________ --Seth Support GrandAmGT.com sponsors! My Picture Gallery \| GoneDragRacing.com Drag Racing Photos & Videos

11-27-2007, 10:46 PM	#50
BrianV Guest Posts: n/a	I admit I didn't read it all because I didn't realize there were 3 pages in the thread...I only read one page. Sorry. Unfortunately, I don't see any solutions here though.

12-18-2007, 06:56 PM	#51
gectek I hate nose hair AKA: John Join Date: Oct 2006 Location: Lubbock, TX Posts: 2,051 Vehicle: 2002 Grand Am GT sc/t	the harness goes to the injector/cmp sensor harness under the UIM...it usually gets damaged easily because it is in such a dumb location with a short harness __________________ If you unscrew ur belly button, will ur butt fall off? Procrastinators UNITE!!!.....tomorrow

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