What does code P2195 mean?

Q: What does code P2195 mean?

O2 Sensor Signal Stuck Lean (Bank 1 Sensor 1). P2195 means the engine computer has detected that the upstream oxygen sensor on bank 1 is reporting a lean exhaust condition and that the signal is stuck, meaning it is not switching rich and lean as it should. The computer compares this sensor's voltage behavior against expected limits and other sensors, and it sets the code when the lean reading persists without the normal rapid voltage changes.

DTC codes / P21xx · Fuel and air metering / P2195

P2195O2 Sensor Signal Stuck Lean (Bank 1 Sensor 1)

P2195 means the engine computer has detected that the upstream oxygen sensor on bank 1 is reporting a lean exhaust condition and that the signal is stuck, meaning it is not switching rich and lean as it should. The computer compares this sensor's voltage behavior against expected limits and other sensors, and it sets the code when the lean reading persists without the normal rapid voltage changes.

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.