2007 Mustang 4.0L V6 Emission Light Question - Ford Mustang Forum
 
LinkBack Thread Tools
post #1 of 5 (permalink) Old 10-27-2014 Thread Starter
Rookie
 
DmjoToMpfta's Avatar
 
Joined: Oct 2014
Location: Mid-West
Posts: 3
 
2007 Mustang 4.0L V6 Emission Light Question

The Emission light went on my 2007 Mustang 4.0L V6 earlier this week. I took it to AutoZone and got the error code read. OEM Number: P0128. The print out said it was either low coolant (which it isn't), a defective thermostat, or a defective Engine Coolant Temperature sensor. Is there any way to determine which of the two it is before replacing either?

Also, anyone else that's had this problem care to comment with advice on what you did to fix? Or if you took it in how much was it for a shop to do?

Any help is appreciated, thanks!

DmjoToMpfta is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 10-27-2014
GT Member
V6 Member
S197 Member
 
az.dsrt's Avatar
 
Joined: Apr 2012
Location: Scottsdale
Posts: 1,214
 
I'd put the money on sensor, replace it. If the thermostat hasn't been replaced, may as well replace the whole unit..

az.dsrt is offline  
post #3 of 5 (permalink) Old 10-27-2014 Thread Starter
Rookie
 
DmjoToMpfta's Avatar
 
Joined: Oct 2014
Location: Mid-West
Posts: 3
 
Thanks for the input, what makes you say sensor? I'm hoping that's it, it seems to be a lot easier to replace.
DmjoToMpfta is offline  
 
post #4 of 5 (permalink) Old 10-28-2014
PONY Member
 
TexasBlownV8's Avatar
 
Joined: Dec 2010
Location: Georgetown
Posts: 714
 
BE SURE YOU ARE NOT LOW ON COOLANT! These cars tend to leak around the t-stat housing.

But also, the temp sensor can do that sometimes, especially as it gets colder.
You could change the sensor, which is what I did when I had the code last winter.

Mike -- 2005 "The Beast" (Formerly a V6, now a forged/stroked 5.0L V8 sportn' a Kenne Bell 2.6L @18psi, and many mods
2006 4.0L w/Powerhouse turbo and TR-6060 :kooky:
TexasBlownV8 is offline  
post #5 of 5 (permalink) Old 10-28-2014 Thread Starter
Rookie
 
DmjoToMpfta's Avatar
 
Joined: Oct 2014
Location: Mid-West
Posts: 3
 
Quote:
Originally Posted by TexasBlownV8 View Post
BE SURE YOU ARE NOT LOW ON COOLANT! These cars tend to leak around the t-stat housing.

But also, the temp sensor can do that sometimes, especially as it gets colder.
You could change the sensor, which is what I did when I had the code last winter.
I'm sure I'm not low on coolant. Last night I unconnected the ECT sensor and dusted off the connection on both ends. Reconnected it and when I started it today the light was off and has been off. I am going to keep an eye on it but hopefully I got lucky.

Thanks with the help so far.
DmjoToMpfta is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On

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


Search Engine Friendly URLs by vBSEO 3.6.1