{"id":613,"date":"2024-02-11T16:01:31","date_gmt":"2024-02-11T16:01:31","guid":{"rendered":"https:\/\/jeepadvices.com\/how-to-troubleshoot-fix-p0128-jeep-wrangler-dtc-code\/"},"modified":"2024-02-15T08:25:35","modified_gmt":"2024-02-15T08:25:35","slug":"how-to-troubleshoot-fix-p0128-jeep-wrangler-dtc-code","status":"publish","type":"post","link":"https:\/\/jeepadvices.com\/how-to-troubleshoot-fix-p0128-jeep-wrangler-dtc-code\/","title":{"rendered":"How to Troubleshoot & Fix P0128 Jeep Wrangler DTC Code?"},"content":{"rendered":"\n
When you have to bear those in your vehicle, engine trouble codes are always an issue. Some codes have serious implications, while others are easy to deal with.<\/p>\n\n\n\n
P0128 is one of the diagnostic trouble codes in the jeep wrangler that indicates irregular coolant temperatures. And here, we will be covering the causes of the code and how to deal with them. Keep reading to find out more!<\/p>\n\n\n\n
The error code P0128 mainly refers to the problem with the engine coolant temperature. <\/p>\n\n\n\n
It is a problem with the engine coolant temperature not reaching the required level for the operation. This issue will persist even after starting your engine on a full scale.<\/p>\n\n\n\n
For the Jeep Wrangler, the problem has similar implications to the other vehicles. We have added the code breakdown below to understand the situation better. <\/p>\n\n\n\n
The OBD-II trouble code P0128 has much to do with the engine’s operating temperature. When the ECM detects anomalies in the engine coolant temperatures, that is where the problem lies. <\/p>\n\n\n\n
Due to such complications, things like decreased fuel economy and higher idles are seen in your Jeep Wrangler. <\/p>\n\n\n\n
That said, some of the prominent reasons behind the sensor not working correctly in the Jeep Wrangler are listed below:<\/p>\n\n\n\n
Read Also:<\/strong> How To Troubleshoot & Fix P0456 Jeep Wrangler DTC Code?<\/a><\/a><\/p>\n\n\n\n The error code P0128 triggers only when the engine’s operating temperature is below 160 F. <\/p>\n\n\n\n It is a persistent problem of the temperature not going up even after running the engine for 15 minutes. To fix this issue, you may adopt various practices manually. <\/p>\n\n\n\n But you must remember that there are several anomalies in the engine for which you are detecting the code. Some of the fixes are discussed as follows:<\/p>\n\n\n\n Before you go for some components replacement, you should attempt to resolve the code by clearing it. For troubleshooting the P0128 code in your Jeep Wrangler, follow the steps as mentioned below:<\/p>\n\n\n\n Clearing the code when the issue is within the PCM will eventually solve the problem. But if this method doesn\u2019t solve your problem, follow the rest of the fixes to get the solution.<\/p>\n\n\n\n Read Also:<\/strong> How to troubleshoot & Fix P06dd Jeep Wrangler DTC Code? [Top 4 Fixes]<\/a><\/p>\n\n\n\n Next, The thermostat is a crucial component in a Jeep wrangler engine as it maintains the stable temperature of the engine. <\/p>\n\n\n\n Isolation of the engine and radiator to ensure that the perfect operating temperature is reached is the primary job of this component. But the trouble increases when the thermostat gets broken or faulty.<\/p>\n\n\n\n Operating temperature is never achieved when the thermostat remains stuck in the engine. That is why the P0128 code becomes predominant, necessitating thermostat replacement. <\/p>\n\n\n\n We have added the steps you must follow if you want to replace the thermostat and fix the problem yourself. In addition, replace both the upper and lower hoses to ensure the desired outcome. Those steps are:<\/p>\n\n\n\n When you are done with the process, you need to start the engine for 20 mins and keep it idle. If the problem were from the thermostat, the error code would go. Or else you might want to check out other issues.<\/p>\n\n\n\n Read Also:<\/strong> How to troubleshoot & Fix C121C Jeep DTC Code?<\/a><\/p>\n\n\n\n Since the problem has a lot to do with temperature levels, faulty temperature sensors can sometimes be an issue. So replacing it with a new one is the most viable fix. The process involved in this is discussed below:<\/p>\n\n\n\n The wires connecting the temperature sensor can get damaged, broken, or corrupted. There is no way to fix them, so you must replace them with new ones.<\/p>\n\n\n\n However, unlike the previous two fixes, replacing the wire is sometimes trickier. Therefore, we suggest you get a mechanic consultation in this regard. At best, replacing the Jeep Wrangler wire would cost around $50-70.<\/p>\n\n\n\nHow to troubleshoot & Fix P0128 Jeep Wrangler code?<\/strong><\/h2>\n\n\n\n
1. Detect and Remove the Code<\/strong><\/h3>\n\n\n\n
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2. Inspect the Thermostat to see if faulty or not<\/strong><\/h3>\n\n\n\n
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3. Replace the faulty coolant temperature sensor<\/strong><\/h3>\n\n\n\n
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4. Replace Corroded Wire on Coolant Temperature Sensor<\/strong><\/h3>\n\n\n\n