C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Odd, blown fuse #2 throws P0128 CEL

Thread Tools
 
Search this Thread
 
Old Jan 2, 2022 | 08:08 PM
  #1  
Lowend's Avatar
Lowend
Thread Starter
Pro
25 Year Member
All Eyes On Me
Liked
Loved
 
Joined: Jan 2001
Posts: 649
Likes: 348
From: San Jose CA
Default Odd, blown fuse #2 throws P0128 CEL

Here's an odd one for you guys.
Long story short: I blew fuse #2 on the interior panel due to a short in the sun visor. During the time it took me to figure out what had happened, I drove the car a couple of hundred miles. During those drives, it started throwing CEL P0128 (Coolant Thermostat). I cleared the code, and it did it again, cleared it again (after some checks to make sure everything was ok). I figured that I was gonna be changing out the ECT sensor or the thermostat next weekend.
This morning I fixed the short/blown fuse and took the car out for a good hard canyon run. Got the oil temp up over 200
CEL is nowhere to be seen.
I'll keep an eye on it and report back. As of now, it appears having Fuse #2 seems to affect the ECT readings to the ECM.
Weird.

Last edited by Lowend; Jan 2, 2022 at 09:31 PM. Reason: Fixed typo
Reply
Old Jan 2, 2022 | 09:12 PM
  #2  
C5 Diag's Avatar
C5 Diag
Moderator, Tech Contributor
Supporting Lifetime Gold
10 Year Member
Veteran: Air Force
Liked
Community Favorite
 
Joined: Sep 2013
Posts: 15,621
Likes: 4,069
From: Cape Coral, Florida
Default

Fuse #2 is not tied into the ECT circuit anywhere...both wires from the ECT sensor are from the PCM...just a coincidence !!
Reply
Old Feb 9, 2022 | 11:01 PM
  #3  
Lowend's Avatar
Lowend
Thread Starter
Pro
25 Year Member
All Eyes On Me
Liked
Loved
 
Joined: Jan 2001
Posts: 649
Likes: 348
From: San Jose CA
Default

Update finally got around to fixing this today. The thermostat had failed and stuck open.
Car runs much better now that it can actually get up to operating temperature.
Reply

Get notified of new replies

To Odd, blown fuse #2 throws P0128 CEL





All times are GMT -4. The time now is 01:25 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE