Jan 7, 2023 · P0128 is a generic powertrain code that means the engine control module (ECM) detected that the motor hadn’t reached its required operating temperature within the required timeframe set by the manufacturer. This timeframe depends on …

When your check engine light is illuminated due to trouble code P0128, you may have an issue with your engine thermostat. Here are some helpful steps to take to find out how do I fix trouble code P0128? Learn how to solve this trouble code and repair your thermostat.

Jul 21, 2021 · What are the common symptoms of an OBDII code P0128 (Coolant Thermostat Malfunction)? - The common symptoms include the engine running hotter or colder than normal, decreased fuel efficiency, and the Check Engine light illuminating.

The P0128 code indicates that your powertrain control module (PCM) monitors that the coolant temperature is lower than the thermostat regulating temperature. For your engine to work efficiently, it’s essential that the engine reaches its designated normal operating temperature.

Past experience indicates that the most likely solution for a P0128 is to replace the thermostat. However here are some suggestions on troubleshooting and repairing a P0128 OBD-II code: Verify proper cooling fan operation (check if it's running more than it …

Jul 31, 2021 · The code P0128 - Coolant Temperature Below Thermostat Regulating Temperature means that the engine does not reach expected temperature after running for sufficient time, or in other words, it takes too long to warm up. Often this code causes the Check Engine light to come on and off in cold temperatures.

Nov 14, 2022 · The P0128 code is a diagnostic trouble code (DTC) for "Engine Coolant Temperature Below Thermostat Regulating Temperature." This code indicates that the engine coolant temperature is not getting hot enough, fast enough.

May 11, 2023 · If the measured engine coolant temperature fails to reach the thermostat regulating temperature, before a predetermined amount of air has entered the engine, this Diagnostic Trouble Code (DTC) sets. P0128 Chevrolet Code - Engine Coolant Temperature Below Thermostat Regulating Temperature

Aug 29, 2022 · The most common cause for the P0128 code is a faulty thermostat. Other issues can be low coolant, bad radiator fan or water pump, inaccurate engine coolant temperature sensor (ECT sensor), or bad engine control module.

Mar 23, 2024 · The P0128 is a diagnostic trouble code (DTC) for a malfunction in the coolant thermostat—coolant temperature below the thermostat’s regulating temperature. In simple terms, when the code shows up, there’s a problem with your car’s coolant thermostat.