P0044
P0044 - HO2S Heater Control Circuit High Bank 1 Sensor 3
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Possible causes
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 circuit poor electrical connection
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 circuit
- Faulty Engine Control Module (ECM)
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 circuit poor electrical connection
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 circuit
- Faulty Engine Control Module (ECM)
Tech notes
HO2S Heater Control Circuit High Bank 1 Sensor 3 is the generic definition for the P0044; however your vehicle's manufacturer may have a different definition and information for the P0044 code.
When is the code detected?
The P0044 is set when the ECM detects an excessively high voltage through the heated oxygen sensor heater circuit
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0044 Description
Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
P0044 Information for specific makes
P0044 AUDI
P0044 INFINITI
P0044 LEXUS
P0044 MAZDA
P0044 MITSUBISHI
P0044 NISSAN
P0044 SUBARU
P0044 TOYOTA
P0044 VOLKSWAGEN
P0044 INFINITI
P0044 LEXUS
P0044 MAZDA
P0044 MITSUBISHI
P0044 NISSAN
P0044 SUBARU
P0044 TOYOTA
P0044 VOLKSWAGEN
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