O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1
The engine computer thinks the air-fuel mixture is too lean on bank 1, sensor 1, and the oxygen sensor signal is not changing normally.
You can usually drive short term, but the engine may run poorly, use more fuel, misfire, or damage the catalytic converter if the problem gets worse. Repair should not be delayed.
P2195 means the powertrain control module has detected that the upstream oxygen sensor on Bank 1, Sensor 1 is reading a signal that indicates a lean air-fuel mixture and that the signal is staying lean or not responding as expected. Bank 1 is the side of the engine with cylinder 1. Sensor 1 is the upstream sensor before the catalytic converter. This code often points to an actual lean condition, an exhaust leak, a vacuum leak, fuel delivery issues, intake air leaks, or a faulty oxygen/fuel-air sensor or wiring problem.
It means the upstream oxygen sensor on Bank 1 is reporting a lean signal and appears stuck or biased lean.
Sometimes, but not always. Vacuum leaks, exhaust leaks, fuel delivery problems, and wiring faults can also cause it.
Usually for short trips, but it should be diagnosed soon because the engine may run poorly and fuel economy may drop.
No. The code will likely return if the underlying cause is still present.
It is the upstream oxygen sensor on the bank of the engine that contains cylinder 1, located before the catalytic converter.
Yes. Extra air entering the engine can make the mixture lean and trigger this code.