What does code P019D mean?

Q: What does code P019D mean?

O2 Sensor Delayed Response - Lean to Rich Bank 2 Sensor 3. P019D indicates that the powertrain control module has detected an excessively slow transition from lean to rich on the downstream oxygen sensor for bank 2, which is sensor 3. The computer monitors the sensor's voltage response time during commanded air-fuel ratio changes and flags the code when the lean-to-rich switch takes longer than the calibrated threshold.

DTC codes / P01xx · Fuel and air metering / P019D

P019DO2 Sensor Delayed Response - Lean to Rich Bank 2 Sensor 3

P019D indicates that the powertrain control module has detected an excessively slow transition from lean to rich on the downstream oxygen sensor for bank 2, which is sensor 3. The computer monitors the sensor's voltage response time during commanded air-fuel ratio changes and flags the code when the lean-to-rich switch takes longer than the calibrated threshold.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

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.