What does code P014B mean?

Q: What does code P014B mean?

O2 Sensor Delayed Response - Lean to Rich Bank 2 Sensor 2. P014B means the powertrain control module has detected that the downstream oxygen sensor on bank 2 is taking too long to switch from a lean voltage to a rich voltage when the fuel mixture changes. The computer commands a rich-to-lean transition and watches the sensor's response time, and if the sensor lags beyond a calibrated threshold, it stores this code.

DTC codes / P01xx · Fuel and air metering / P014B

P014BO2 Sensor Delayed Response - Lean to Rich Bank 2 Sensor 2

P014B means the powertrain control module has detected that the downstream oxygen sensor on bank 2 is taking too long to switch from a lean voltage to a rich voltage when the fuel mixture changes. The computer commands a rich-to-lean transition and watches the sensor's response time, and if the sensor lags beyond a calibrated threshold, it stores this code.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaFuel and air metering

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.