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code P0126?

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Old 07-13-2012, 11:30 AM
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moosestang
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Default code P0126?

I can't find any other mustang owners that have gotten this code. Searching with google I keep finding posts where people list all the codes!

Stop listing all the codes people!!!! It makes searching a bitch.

The code means coolant temp insufficient for stable operation. Does that mean my thermostat is stuck open?

Last edited by moosestang; 07-13-2012 at 11:58 AM.
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Old 07-13-2012, 11:45 AM
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Originally Posted by moosestang
Stop listing all the codes people!!!! It makes searching a bitch.
Someone needs to get more sleep... LOL...

Sorry can't help with the actual problem... Good luck.

Don
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Old 07-13-2012, 12:00 PM
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It seems to be the T-stat stuck open that causes this code. Now should I order a 160* like the one that came with the whipple kit or just drop a 180 in there. I doubt any local place will have a 160* Tstat.

I do need more sleep, but that **** is annoying!
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Old 07-13-2012, 12:35 PM
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The standard 180* thermostat could probably be picked up locally for not too much... If this is a DD, I would get that to clear the code now, and then order the 160 because, like you said, it probably won't be on any auto parts store's shelves. If this is not a DD, then I'd get the one the Whipple came with.

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Old 07-13-2012, 01:42 PM
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Originally Posted by BigDinTexas
The standard 180* thermostat could probably be picked up locally for not too much... If this is a DD, I would get that to clear the code now, and then order the 160 because, like you said, it probably won't be on any auto parts store's shelves. If this is not a DD, then I'd get the one the Whipple came with.

Don
I'm going to get the 180. After a little research it seems like the better choice. Not sure why whipple spec'd a 160. It's not like it will keep the engine any cooler. They have a 180 in stock at advanced. I think 195 is stock.
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Old 07-13-2012, 02:27 PM
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Check the coolant temp sensor on the intake. I had to replace one last week in my 4.0 Explorer with the same code. It wasn't the t/stat. The one in the Expl was a clip held sensor, not the normal threaded type. It was only $16 retail, and upped the mpg from 15 to back to over 21. Cured the problem with in less than 3 minutes and I didn't have to fight refilling the cooling system. Good luck.
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Old 07-13-2012, 02:48 PM
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Originally Posted by akdoggie
Check the coolant temp sensor on the intake. I had to replace one last week in my 4.0 Explorer with the same code. It wasn't the t/stat. The one in the Expl was a clip held sensor, not the normal threaded type. It was only $16 retail, and upped the mpg from 15 to back to over 21. Cured the problem with in less than 3 minutes and I didn't have to fight refilling the cooling system. Good luck.

There's no coolant temp sensor on the mustang, only a head temp sensor.


It turns out I either read the code wrong or my aeroforce gauge was reporting it wrong. I scanned it with the sct and the codes were p0161 and p2272, both related to me unplugging the rear 02 sensor and replacing it with a wideband o2.

I still might get a 180. Everything I read suggests more engine wear with a 160. My coolant temps usually run at 172-176 on a cool morning, so we are only talking a few degrees higher with a 180.

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Old 07-13-2012, 04:10 PM
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What kind of stang is this on? I looked up a 4.0L, 4.6L, and 5.0L on alldata and it doesnt list that code at all.
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Old 07-13-2012, 04:29 PM
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it wasn't P0126 after all Hotrod, it was P0161

btw, i couldn't find 126 in the ford mustang list either.....
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Old 07-13-2012, 04:53 PM
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Originally Posted by hammeron
it wasn't P0126 after all Hotrod, it was P0161

btw, i couldn't find 126 in the ford mustang list either.....
That's probably why I couldn't find any posts about it, lol! It is a ford trouble code though.

Now someone just needs to post the code list!
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