P0185 Code- Fuel Temperature Sensor 'B' Circuit Malfunction

Discussion in 'P - Powetrain Codes' started by fault code, Dec 13, 2017.

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    fault code Administrator Staff Member

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    What Does P0185 Mean?

    The PCM has detected an abnormal voltage reading from the fuel temperature sensor (flex fuel sensor) or circuit. This sensor is designed to detect fuel (ethanol) contamination and provide the PCM with an accurate fuel temperature.

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    2008-10-07_195305_fuel_temp_sensor-300x219.jpg

    What are the common causes of P0185 ?
    • The engine control module (ECM) sees that the sensor circuit is malfunctioning below or above the specified range designed for the sensor.
    • The code could be set if the fuel is too hot or too cold.
    • The fuel tank or fuel rail temperature sensor is out of sensor range or the connector is corroded.
    • The ECM monitors the temperature of the diesel fuel when the fuel heater is activated. If the temperature is out of range, it will turn on the Check Engine Light and set the code.
    How do you troubleshoot P0185 ?

    The original multi-displacement system turned off opposite pairs of cylinders, allowing the engine to have three different configurations and displacements. P0185 code had an elaborate diagnostics procedure, including showing engine trouble codes on the air conditionning display. However, the system was troublesome, misunderstood by customers, and a rash of unpredictable failures led to the technology being quickly retired.

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