Temperature Gauge
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 2,789
Likes: 3
From: Jacksonville FL
Temperature Gauge
Gang,
My temp gauge just pegged to 260. Car doesn't seem exceptionally hot. Also, after letting car sit and cool off for an hour, when I crank the engine then th gauge immediately goes back to redline/260 degrees.
Any suggestions?
Thanks much!
Jax
My temp gauge just pegged to 260. Car doesn't seem exceptionally hot. Also, after letting car sit and cool off for an hour, when I crank the engine then th gauge immediately goes back to redline/260 degrees.
Any suggestions?
Thanks much!
Jax
Pro
Joined: Aug 2010
Posts: 593
Likes: 9
From: San Antonio Texas
Is it pegged on hot? When the oil pressure does this it means the oil pressure sending unit is faulty. I would suspect the same kind of thing with the temp sending unit. Have you checked the wires going to the sending unit? Sounds like maybe a dead ground.
Other members may have more experience with this than me. Good Luck
Other members may have more experience with this than me. Good Luck
Melting Slicks
Joined: Jan 2009
Posts: 3,181
Likes: 286
From: Puyallup Washington
Check the temperature with the digital readout. The temp guage is an indicator. The digital guage is accurate. To do this press the gauges button to get the guage readings where the odometeer reading is normally shown. Then press the button until the water temp comes up. That will show you your true water temp. Most likely the sender for the analog guage is bad and needs to be replaced.
Melting Slicks
Joined: Jun 2009
Posts: 2,916
Likes: 10
From: Jesuit Bend Louisiana
Check the temperature with the digital readout. The temp guage is an indicator. The digital guage is accurate. To do this press the gauges button to get the guage readings where the odometeer reading is normally shown. Then press the button until the water temp comes up. That will show you your true water temp. Most likely the sender for the analog guage is bad and needs to be replaced.
The only other thing is air bubbles in the system....but this is unlikely unless you just had your coolant changed....
Racer
Joined: Oct 2011
Posts: 398
Likes: 6
From: woodstock ga
Check the temperature with the digital readout. The temp guage is an indicator. The digital guage is accurate. To do this press the gauges button to get the guage readings where the odometeer reading is normally shown. Then press the button until the water temp comes up. That will show you your true water temp. Most likely the sender for the analog guage is bad and needs to be replaced.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 2,789
Likes: 3
From: Jacksonville FL
Thanks all! Very helpful info thus far. The digital display says xxx degrees. The gauge reads pegged at 260 even right after the car is started from stone cold.
For whatever it is worth... I did get a new battery today...
For whatever it is worth... I did get a new battery today...
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Race Director
Joined: Oct 2004
Posts: 13,619
Likes: 1,359
From: Home of the VOLS ! Knoxville, TN. Tennessee
St. Jude Donor '11-'12-'13, '15, '16-'17-'18-'19
Try unhooking the battery for a minute and re-hooking it back up. Things might reset. I will watch this post, if this does not help you, I will dig into the factory repair manual.
It does sound like a faulty sending unit though.
Also try to pull any codes from the DIC and report.
It does sound like a faulty sending unit though.
Also try to pull any codes from the DIC and report.
Race Director
Joined: Oct 2004
Posts: 13,619
Likes: 1,359
From: Home of the VOLS ! Knoxville, TN. Tennessee
St. Jude Donor '11-'12-'13, '15, '16-'17-'18-'19
Race Director
Joined: Oct 2004
Posts: 13,619
Likes: 1,359
From: Home of the VOLS ! Knoxville, TN. Tennessee
St. Jude Donor '11-'12-'13, '15, '16-'17-'18-'19
The ECT sensor is located behind the Alternator and into the block according to the manual.
Make sure the connections there are good. If you should have to replace the ECT sensor, you will need to drain the fluids, remove the alternator so you can have access to the ECT. I can try and scan the removal and installation instructions for you should you get to that point.
Make sure the connections there are good. If you should have to replace the ECT sensor, you will need to drain the fluids, remove the alternator so you can have access to the ECT. I can try and scan the removal and installation instructions for you should you get to that point.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
FYI only, the coolant temperature sensor is a critical item to the operation of the engine. It tells the PCM the obvious, engine temperature, which in turn the PCM selects different tuning or control parameters to run the engine. Many of the tables inside the PCM are based on temperature. I've only heard of one or two ECT sensor failures so far so check the connector to it first.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 2,789
Likes: 3
From: Jacksonville FL
Try unhooking the battery for a minute and re-hooking it back up. Things might reset. I will watch this post, if this does not help you, I will dig into the factory repair manual.
It does sound like a faulty sending unit though.
Also try to pull any codes from the DIC and report.
It does sound like a faulty sending unit though.
Also try to pull any codes from the DIC and report.
Excellent, thank you so much. I'll be back shortly to report.
Glad to know that there is only one sender. I hope it doesn't require draining all the fluids as they are fresh... the joys of ownership
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 2,789
Likes: 3
From: Jacksonville FL
FYI only, the coolant temperature sensor is a critical item to the operation of the engine. It tells the PCM the obvious, engine temperature, which in turn the PCM selects different tuning or control parameters to run the engine. Many of the tables inside the PCM are based on temperature. I've only heard of one or two ECT sensor failures so far so check the connector to it first.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 2,789
Likes: 3
From: Jacksonville FL
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Almost sure you really aren't at those temperatures for real. I would think you can get it to a dealer assuming its not too cold outside which would warrant a richer mixture from the PCM controls. Just take it easier over there if you decide that direction.
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
Did you pull the DTCs? And if so what were they?
If your PCM detected an engine over temperature condition, it would have set a MIL (check engine) lamp. The PCM would have sent the IPC to turn on service engine soon lamp. The PCM will alternately disable two groups of four cylinders by turning off the injectors. And it would have stored all this as a freeze frame.
I doubt you hit the max temp and not noticed.
If your PCM detected an engine over temperature condition, it would have set a MIL (check engine) lamp. The PCM would have sent the IPC to turn on service engine soon lamp. The PCM will alternately disable two groups of four cylinders by turning off the injectors. And it would have stored all this as a freeze frame.
I doubt you hit the max temp and not noticed.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 2,789
Likes: 3
From: Jacksonville FL
Good info. I'm learning. Glad to know I can get it there if needed. Fortuantely, the battery disconnect and reconnect seems to have worked for now. I drove 15-20 miles afterward and temp is fine on the DIC and the gauge. Not sure what happened yesterday but hopefully it was some quirky thing and all is good!
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 2,789
Likes: 3
From: Jacksonville FL
Did you pull the DTCs? And if so what were they?
If your PCM detected an engine over temperature condition, it would have set a MIL (check engine) lamp. The PCM would have sent the IPC to turn on service engine soon lamp. The PCM will alternately disable two groups of four cylinders by turning off the injectors. And it would have stored all this as a freeze frame.
I doubt you hit the max temp and not noticed.
If your PCM detected an engine over temperature condition, it would have set a MIL (check engine) lamp. The PCM would have sent the IPC to turn on service engine soon lamp. The PCM will alternately disable two groups of four cylinders by turning off the injectors. And it would have stored all this as a freeze frame.
I doubt you hit the max temp and not noticed.
THANK YOU!