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

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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