In today’s video, Zach takes a deep dive into engine fault code P0128, a diagnostic puzzle that can leave car owners scratching their heads. He covers valuable insights into its causes, symptoms, and how to diagnose and resolve fault code P0128. Is it the thermostat, coolant temperature sensor, cooling fan, or coolant? Whether you're a DIY enthusiast or someone looking to better communicate with your mechanic, this video is for you!

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00:15 – Fault Code P0128 Meaning – Coolant Temperature Below Thermostat Regulating Temperature
00:34 – Most Common Causes for Engine Code P0128
01:00 – The MOST COMMON Cause for Fault Code P0128 - Thermostat
03:15 –Common Cause #2 for Engine Fault Code P0128 – Coolant Temperature Sensor (CTS)
04:34 – Common Cause #3 for Engine Fault Code P0128 – Cooling Fan
06:06 – Common Cause #4 for Engine Fault Code P0128 – Engine Coolant
06:41 – How to Diagnose Engine Fault Code P0128