BMW DTC P2273 – O2 Sensor Signal Biased/Stuck Rich (Bank 2 Sensor 2)
DTC P2273 meaning on BMW
DTC P2273 on a BMW indicates that the O2 sensor signal for Bank 2 Sensor 2 is biased or stuck rich. This means that the oxygen sensor downstream of the catalytic converter on the second bank of cylinders is providing a signal indicating a consistently rich air-fuel mixture.
BMW DTC P2273 symptoms
Symptoms of DTC P2273 on a BMW may include decreased fuel efficiency, rough idling, engine hesitation, and potentially an illuminated Check Engine Light on the dashboard.
BMW DTC P2273 causes
The most common causes of DTC P2273 on a BMW include a faulty O2 sensor, a wiring issue in the O2 sensor circuit, a vacuum leak, a fuel pressure problem, or an exhaust leak near the sensor.
BMW DTC P2273 seriousness
While DTC P2273 may not cause immediate drivability issues, it can lead to decreased fuel efficiency and potentially cause damage to the catalytic converter over time if left unresolved.
How to diagnose DTC P2273 on BMW
To diagnose DTC P2273 on a BMW, a mechanic would typically use a scan tool to read the fault code and then perform a visual inspection of the O2 sensor and its wiring. They may also conduct tests to check for vacuum leaks, fuel pressure issues, or exhaust leaks that could be contributing to the problem.
How to fix DTC P2273 on BMW
Fixing DTC P2273 on a BMW usually involves replacing the faulty O2 sensor, repairing any damaged wiring, fixing vacuum leaks, addressing fuel pressure problems, or repairing exhaust leaks near the sensor. Once the underlying issue is resolved, the fault code should be cleared.
How to erase DTC P2273 on BMW
To erase DTC P2273 on a BMW, a mechanic can use a scan tool to clear the fault code after the underlying issue has been fixed. This will reset the Check Engine Light and allow the vehicle’s onboard computer to monitor the system for any new faults.