Why 180-Degree Thermostats Trigger Check Engine Lights (And Why They’re Bad)
Installing a 180-degree thermostat causes P0128 check engine codes in cold weather and damages your engine. Learn why it doesn’t work for street driving.
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P01F0 Code on Duramax: Why Your Thermostat Might Be the Culprit
A stuck-open thermostat is the most common cause of P01F0 on Duramax engines. After ruling out sensor issues, replacing both thermostats usually resolves the code and gets your LML back to proper operating temperature.
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Why Your Radiator Fan Runs Constantly: Diagnosis and Fixes
A cooling fan stuck on full speed is usually not an ECU failure. Learn the actual culprits—thermostat, temperature sensor, relay, or A/C system—and how to pinpoint what’s wrong.