P1281 Engine Cold Too Long

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Ram20015.9
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P1281 Engine Cold Too Long

Post by Ram20015.9 »

2001 ram 1500 5.9 gas.
Predator 2 with 180 t-stat.
I'm getting a P1281 Engine is Cold Too Long code and its de-tuning the engine.
Anyone else have that issue?
New tuner & new t-stat.
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mikel
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Re: P1281 Engine Cold Too Long

Post by mikel »

you don't get that code with the stock tune?
Mike Litsch
DiabloSport Brand Manager
Diablo Tech support by phone:
561-908-0040
M-F 8:00 AM to 5:00 PM EST

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Ram20015.9
Posts: 2
Joined: Tue Jun 30, 2026 5:41 pm

Re: P1281 Engine Cold Too Long

Post by Ram20015.9 »

I did the 180 t-stat and tuner at the same time.
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mikel
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Re: P1281 Engine Cold Too Long

Post by mikel »

OK, may need to consider a stock or warmer stat.
Hemis have a similar code when running too cool a stat, but there's some changes in custom tuning that can be done to work around it, but that's not an option here unfortunately.
Mike Litsch
DiabloSport Brand Manager
Diablo Tech support by phone:
561-908-0040
M-F 8:00 AM to 5:00 PM EST

[email protected]
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