P0044
HO2S Heater Control Circuit High Bank 1 Sensor 4
Generic code
Fuel and Air Metering
Medium severity
Moderate repair
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What P0044 means
- The fault code P0044 indicates a high voltage condition in the heated oxygen sensor (HO2S) heater control circuit for bank 1, sensor 3. This can result in excessive heating of the oxygen sensor and affect its ability to accurately measure the oxygen content in the exhaust gases.
Possible symptoms
- Check Engine Light illuminated
- Poor engine performance
- Decreased fuel efficiency
- Failed emission test
- Possible rough idling or stalling
Possible causes
- Faulty heated oxygen sensor (HO2S)
- Short circuit in the HO2S heater control circuit
- Faulty engine control module (ECM)
Related parts
- Heated Oxygen Sensor: This is one of the parts that fails very commonly. It measures the amount of oxygen to ensure proper combustion. Problems in the Oxygen Sensor lead to poor fuel economy
Possible solutions
- Test and replace the faulty heated oxygen sensor (HO2S), if necessary
- Inspect and repair any short circuits in the HO2S heater control circuit
- Test and replace the engine control module (ECM) if it is determined to be faulty
Free on OBD DashX
P0044 on OBD DashX
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