Errant temperature reading - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Problems and Service Talk about any mechanical problems you are having

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 09-22-2018, 07:28 AM Thread Starter
Join Date: Sep 2018
Posts: 1
Errant temperature reading

I have 2009 Cobalt that we have tried about everything to fix in the coolant system. The digital gauge reads up to 260 but when you put the gun on the different parts they read nominal temperatures. Replaced the thermostat, water pump, radiator, and temperature sending unit, but the digital read out still shows high.
Dafar is offline  
Sponsored Links
post #2 of 2 (permalink) Old 09-22-2018, 08:24 AM
Super Moderator Premium Member

Coby7's Avatar
Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
Posts: 11,820
Have you tried cleaning the ECM connector? If it cures the bad reading add dielectric grease to the pins of the connector to attempt preventing water from getting in.

---------- Post added at 12:24 PM ---------- Previous post was at 12:22 PM ----------

You may also need to re-seat the connectors under the fuse block under the hood.

Every minute spent angry is a happy minute lost for ever and ever!!!
Drives 2016 Cocoa Buick Encore 1.4L Turbo auto KL4CJDSB2GB652675
Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716

Never drive faster than your guardian angel can fly
Coby7 is offline  
Sponsored Links
Closed Thread

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome