The code P015B on Your Chevy Tahoe stands for O2 sensor Delayed Response, Lean-to Rich (Bank 1, Sensor 1). Bank 1, Sensor 1 refers to the front oxygen sensor.It means that Your vehicle's powertrain control module (PCM) has detected a delayed response time from the upstream oxygen sensor on Bank 1. Some symptoms that You might be experiencing are higher than normal fuel consumption and excessive smoke coming from Your exhaust. The oxygen sensor in Your vehicle measures oxygen levels in the exhaust gases exiting the engine. The oxygen sensor should be replaced every 60,000 to 90,000 miles. This sensor is a wear item and does fail over time.
scotty
September 1, 2022
Thanks Russel L for not knowing s**t, just copy and pasted a google.
How how many O2 sensors does a 2013 Chevy Tahoe have
Russell L.
April 9, 2020
If an obd-ii equipped vehicle has a stored p015b code, this means that the powertrain control module (pcm) detected a delayed response time from the upstream (first after the exhaust leaves the engine, in front of the catalytic converter) oxygen (o2) sensor or engine bank one circuit.
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