P2272 2018 Chevrolet Silverado Code - HO2S Signal Stuck Lean Bank 2 Sensor 2

P2272 indicates that the oxygen sensor (HO2S) for Bank 2 Sensor 2 is detecting a consistently lean signal, meaning there’s insufficient fuel compared to air in the exhaust gases.

Symptoms may include the check engine light turning on, reduced fuel efficiency, poor engine performance, and possibly a noticeable exhaust odor.

Common causes include a faulty oxygen sensor, exhaust leaks, damaged sensor wiring, a failing catalytic converter, or an engine running lean due to a fuel delivery issue.

While it may be drivable, prolonged driving with this code can lead to increased emissions, poor performance, and potential damage to the catalytic converter. It’s best to address it promptly.

Use an OBDII scanner to confirm the code, inspect the wiring and connections for the Bank 2 Sensor 2 oxygen sensor, check for exhaust leaks, and review fuel trim data for lean conditions.

Yes, a failing or clogged catalytic converter can disrupt exhaust flow and cause the oxygen sensor to report a lean condition, triggering the P2272 code.

Possible repairs include replacing the Bank 2 Sensor 2 oxygen sensor, repairing exhaust leaks, fixing damaged wiring, or addressing underlying fuel delivery or catalytic converter issues.

The cost depends on the root cause. Replacing an oxygen sensor typically costs $150–$300, while repairing wiring or exhaust leaks or replacing a catalytic converter can be more expensive.

A dirty air filter is unlikely to directly cause the P2272 code, but it can contribute to engine performance issues that may lead to lean conditions over time.

Ensure regular maintenance, including inspecting oxygen sensors, checking for exhaust leaks, maintaining fuel system components, and addressing engine performance issues promptly.