Introduction and Problem Diagnosis

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Fixing P0128 on My 2017 Jeep Wrangler — EASY Thermostat Replacement!

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What happens here

The video begins with an introduction to the project: replacing the thermostat on a 2017 Jeep JK. The reasons for replacement are discussed, including a P0128 diagnostic trouble code (DTC), which indicates the engine coolant temperature is below the thermostat regulating temperature, low engine coolant level, and poor cabin heating. The presenter notes that he has already purchased a new thermostat and proceeds with the replacement.

Goal: Understand the purpose and necessity of replacing the thermostat due to diagnostic code and heating issues.

What they say

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All right. So, today we're working on my wife's 2017 Jeep JK. It is throwing a P0128 code. Um, upon inspection, the engine coolant was low, so I filled the engine coolant back up and the light did go off. Should I be continuing this? Probably not. Am I going to? Yes, we're going to replace the thermostat. The reason that we're going to replace the thermostat, there's a couple reasons. One is I want to make sure that the thermostat is good to go. And also, I already ordered it. I'm not going to return it. And if I keep it here, I'm going to lose it. I'm going to break it. It's going to get dirty. Whatever. and three. Her heat hasn't really worked since we bought it. And this could be one of the culprits. So, we're going to swap it out. And you guys are coming along for the ride.

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