P0050
HO2S Heater Control Circuit Bank 2 Sensor 1
Generic code
Fuel and Air Metering
Medium severity
Moderate repair
Free on OBD DashX
Want real-world data on P0050?
See which problems come with P0050, how often it shows up in other vehicles, and how to fix it — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
What P0050 means
- The fault code P0050 indicates that there is an issue with the heater control circuit for the oxygen sensor in bank 2, sensor 1. The oxygen sensor is responsible for monitoring the oxygen level in the exhaust and helps the engine control module (ECM) to adjust the fuel injection and ignition timing. The heater is used to bring the oxygen sensor up to operating temperature more quickly for accurate readings.
Possible symptoms
- Illuminated check engine light
- Reduced fuel efficiency
- Reduced engine power or acceleration
- Rough idle or stalling
Possible causes
- Failed oxygen sensor heater
- Corroded or damaged wiring or connections in the circuit
- Failed 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
- Replace the oxygen sensor
- Check and repair any damaged wiring or connections
- Test and replace the engine control module (ECM) if necessary
Free on OBD DashX
P0050 on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P0050 No sign-up needed · available in 10 languagesScan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.