P014B 2015 Chevrolet Silverado Code - HO2S Delayed Response Lean to Rich Bank 2 Sensor 2

P014B indicates that the downstream oxygen sensor (Bank 2 Sensor 2) is detecting a delayed response in switching from a lean to a rich condition.

Common symptoms include an illuminated check engine light, reduced fuel efficiency, poor engine performance, or no noticeable symptoms at all.

Possible causes include a faulty downstream O2 sensor (Bank 2 Sensor 2), exhaust leaks, wiring issues, or a problem with the engine control module (ECM).

Bank 2 refers to the side of the engine opposite the #1 cylinder, and Sensor 2 is the downstream oxygen sensor located after the catalytic converter.

While it is typically safe to drive short distances, prolonged driving with this code may lead to increased emissions and potential damage to the catalytic converter.

Repairs may include replacing the downstream O2 sensor on Bank 2, repairing exhaust leaks, fixing damaged wiring, or updating/reprogramming the ECM.

Use an OBDII scanner to confirm the code, inspect the O2 sensor and wiring for damage, check for exhaust leaks, and monitor live data to verify sensor performance.

Replacing an oxygen sensor typically costs $150–$400, including parts and labor, but the total cost depends on the exact cause of the issue.

While uncommon, a severely clogged air filter may affect air-fuel ratios and contribute to sensor-related codes, though it’s not a primary cause.

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.