Engine Coolant temperature sensor?

2004 OLDSMOBILE ALERO
11,700 MILES • 6 CYL • FWD • AUTOMATIC
Avatar
MRV21
  • MEMBER
  • 4 POSTS
Is there a quick check for the temperature sensor to make sure it is good? I would rather check this first before r/r the thermostat. Thanks.
Mar 11, 2009 at 11:22 AM
Advertisement
Avatar
BLUELIGHTNIN6
  • ✓ASE Certified Mechanic
  • 16,542 POSTS
  • ASE Certified Mechanic
Inspect for the following conditions:

Corrosion on the ECT sensor terminals
Improper or corroded terminals at the ECT harness connector
Loose terminals in the ECT harness connector.


If all OK here, measure the voltage from the signal circuit of the ECT sensor to a good ground with a DMM. Voltages should be 4.8 - 5.2 V .




Thanks for using 2CarPros.com!
Mar 11, 2009 at 1:52 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.