P0044 Code- HO2S Heater Control Circuit High Bank 1 Sensor 3

Discussion in 'P - Powetrain Codes' started by fault code, Jun 15, 2017.

  1. fault code

    fault code Administrator Staff Member

    May 11, 2017
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    What Does Code P0044 Mean

    P0044 is set by the engine control unit (ECU) when excessively high voltage is found for the heater control circuit on bank 1 sensor 3. This high voltage creates an inaccurate reading from the heated oxygen sensor causing the ECU to turn on the Check Engine Light.

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    Possible symptoms
    • Engine Light ON (or Service Engine Soon Warning Light)
    Possible causes
    • Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3
    • Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 harness is open shorted
    • Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 circuit poor electrical connection
    • Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 fuse
    • Faulty Engine Control Module (ECM)
    What repairs can fix the P0044 code?

    The most common repairs are:
    • Heated oxygen sensor bank 1 sensor 3 replacement
    • Repair open or short in wiring
    • ECU replacement or repair
    • Fix connection issues
    • Replace blown fuse
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