Posts Tagged: Coolant Sensor Failure

Why The Engine Coolant Temperature Sensor Sets a P0119

How I Diagnose a P0119 Using Professional Techniques Quick Summary A P0119 code means your engine coolant temperature sensor (ECT) is producing an erratic or intermittent signal. In most cases, the P0119 code is caused by: • Failing engine coolant temperature sensor, • Corroded connector, • Damaged wiring harness, • Low coolant level, or • Poor thermostat operation. Fixing a P0119 problem requires testing the coolant level, inspecting the wiring, checking sensor resistance, verifying the ECM reference voltage, and confirming the engine reaches proper operating temperature. Below, I’ll walk you … Read More