P0189 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P0189 – Fuel Temperature Sensor ‘B’ Circuit Intermittent


P0189: DIY Repairing Video Tutorial


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P0189 Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light)  

P0189 Possible Causes

  Faulty Fuel Temperature Sensor,Fuel Temperature Sensor harness is open or shorted,Fuel Temperature Sensor circuit poor electrical connection  

P0189 Description

  The fuel tank temperature sensor is used to detect the fuel temperature inside the fuel tank. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the fuel temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.