P0128 Error Code - Club Lexus Forums

P0128 Error Code

Thread Tools Search this Thread
Old 07-30-14, 12:17 PM   #1
Driver School Candidate
Thread Starter
Join Date: Jul 2014
Location: FL
Posts: 1
Default P0128 Error Code

Hi Everyone,

I have been getting a P0128 pretty often lately. It doesn't stay on all the time, sometimes it does go away and comes back. This is the only error code I get when I look up the Check Engine Light.

Based on the error code, I assume its either the Thermostat or the Coolant Temp Switches.

With the car cool, I remove the radiator cap and start the car. The coolant does not flow. I just slow rises after a while. Based on this, I assume the Thermostat is not stuck wide open.

I'm going to test the 2 Coolant Temp Switches. I know the #1 CTS is located at the bottom of the radiator. Can anyone show me a picture of where the #2 CTS is located?

Anyone have an idea what might cause this error code?
Any other troubleshooting ideas?

Thank you.
chopstick8 is offline   Reply With Quote
Old 07-30-14, 03:08 PM   #2
Join Date: Apr 2001
Location: Austin, TX
Posts: 9,648

Please post the behavior of temp gauge.

If the thermostat is stuck open, then it would take abnormally long time to get to the middle of the gauge.

salimshah is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Location of coolant temperature sensor? 1999 SC300 mjr955201 Performance & Maintenance 6 06-08-16 12:29 AM
Check Engine/TRAC light on, VSC light blinks and P0128 code lexsc4 RX - 2nd Gen (2004-2009) 5 05-30-16 10:06 PM
P0128 hypervish ES - 1st to 4th Gen (1990-2006) 5 01-23-16 06:30 PM
ES300 with code P0128 - need assistance please blucobra03 ES - 1st to 4th Gen (1990-2006) 1 01-22-16 05:07 PM
Still getting some codes after accident.. P0430 & p0125 LexBrett SC430 - 2nd Gen (2001-2010) 27 09-03-15 08:50 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -7. The time now is 10:10 AM.

Copyright © 2000-2016 Internet Brands, Inc. All Rights Reserved