Thermostat issue Code P0128

2016 DODGE CARAVAN
80,000 MILES • 3.6L • 6 CYL • 2WD • AUTOMATIC
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PETE CUNNINGHAM
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Here is the info I have. Wondering what I need to do to fix this.
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Dec 13, 2021 at 10:49 AM
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SQM
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Hello,

The code P0128 can be triggered by a faulty thermostat, low coolant level or other coolant system issues.

What drivability issues are you experiencing? Is it running cooler than it should?

I have attached the troubleshooting steps for code P0128 below. Go through those steps and it can help to figure out the issue.

Please let me know if you have any questions.
Thank you.
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Dec 13, 2021 at 11:14 AM
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PETE CUNNINGHAM
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Yes, it's running cool.
Dec 13, 2021 at 11:33 AM
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SQM
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It could be do to the thermostat opening too soon or just stuck open.
Go through the troubleshooting guide above. Let me know what you find.
Dec 13, 2021 at 11:59 AM
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SQM
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I have attached the thermostat replacement procedure below.
Let me know of any questions.
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Dec 13, 2021 at 7:48 PM
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PETE CUNNINGHAM
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I replaced the thermostat and problem solved..thank you !!
Dec 16, 2021 at 12:19 PM
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SQM
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You are welcome. That is great news.
Dec 16, 2021 at 12:50 PM