P0031
HO2S Heater Control Circuit Low Bank 1 Sensor 1
Generic code
Fuel and Air Metering
Medium severity
Moderate repair
Free on OBD DashX
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What P0031 means
- The fault code P0031 indicates that bank 1, sensor 1 oxygen sensor (HO2S) has a low voltage signal to the heater circuit.
Possible symptoms
- Illuminated check engine light
- Poor fuel economy
- Rough idle
- Failed emissions test
Possible causes
- Failed oxygen sensor
- Damaged wiring or connections in the circuit
- Failed powertrain control module (PCM)
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
- Replace the oxygen sensor
- Check and repair any damaged wiring or connections
- Replace the powertrain control module (PCM) if necessary
Free on OBD DashX
P0031 on OBD DashX
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