P2195 and related codes: oxygen sensors stuck lean or rich, swapped or out of range
An oxygen sensor (sensor 1, 2 or 3 on bank 1 or 2) is stuck reading lean or rich, out of range during deceleration or out of its expected range (P2A00 to P2A05), the signals of two sensors seem swapped, the exhaust sample is wrong, or the fuel trim after the catalyst is too lean or too rich.
SeverityModerateUsually not urgent today, but it can get worse if left.
Can you keep driving?Drive gently, check it soonWhat does P2195 mean?
The computer expects the oxygen sensors to move: the sensor before the catalyst should swing quickly, and all of them should read lean when the fuel is cut during deceleration. A sensor stuck at one value, or one whose behavior matches a different position, cannot be trusted. Sometimes the sensor is fine and the exhaust really is lean or rich, because of an air leak, a fuel problem or a misfire, so these codes call for checking the engine before replacing the sensor.
What causes P2195?
- An aged or contaminated oxygen sensor
- An exhaust leak ahead of the sensor letting air in
- Sensor connectors swapped after a repair, for the swapped codes
- A real mixture fault, such as an air leak or a leaking injector
- Fuel or oil contamination from an engine fault
What to check first for P2195
- Check that the sensor connectors are on the right sensors after any exhaust work
- Look for exhaust leaks ahead of the sensors
- Watch the sensors on a scan tool: they should switch and go lean when lifting off the throttle
- Read the fuel trims to see whether the mixture is really lean or rich
Can you drive with P2195?
Usually you can drive to a workshop. Fuel use may rise and the catalyst can suffer over time, so have it checked soon, and sooner if the engine runs rough.
Since May 2018 an engine warning light that stays on is a major defect at the MOT, so the car fails until the fault is fixed.
Codes on this page
31
- P0040O2 Sensor Signals Swapped Bank 1 Sensor 1/ Bank 2 Sensor 1
- P0041O2 Sensor Signals Swapped Bank 1 Sensor 2/ Bank 2 Sensor 2
- P2096Post Catalyst Fuel Trim System Too LeanBank 1
- P2097Post Catalyst Fuel Trim System Too RichBank 1
- P2098Post Catalyst Fuel Trim System Too LeanBank 2
- P2099Post Catalyst Fuel Trim System Too RichBank 2
- P2195O2 Sensor Signal Stuck LeanBank 1 Sensor 1
- P2196O2 Sensor Signal Stuck RichBank 1 Sensor 1
- P2197O2 Sensor Signal Stuck LeanBank 2 Sensor 1
- P2198O2 Sensor Signal Stuck RichBank 2 Sensor 1
- P2270O2 Sensor Signal Stuck LeanBank 1 Sensor 2
- P2271O2 Sensor Signal Stuck RichBank 1 Sensor 2
- P2272O2 Sensor Signal Stuck LeanBank 2 Sensor 2
- P2273O2 Sensor Signal Stuck RichBank 2 Sensor 2
- P2274O2 Sensor Signal Stuck LeanBank 1 Sensor 3
- P2275O2 Sensor Signal Stuck RichBank 1 Sensor 3
- P2276O2 Sensor Signal Stuck LeanBank 2 Sensor 3
- P2277O2 Sensor Signal Stuck RichBank 2 Sensor 3
- P2278O2 Sensor Signals Swapped Bank 1 Sensor 3 / Bank 2 Sensor 3
- P2297O2 Sensor Out of Range During DecelerationBank 1 Sensor 1
- P2298O2 Sensor Out of Range During DecelerationBank 2 Sensor 1
- P2414O2 Sensor Exhaust Sample ErrorBank 1 Sensor 1
- P2415O2 Sensor Exhaust Sample ErrorBank 2 Sensor 1
- P2416O2 Sensor Signals Swapped Bank 1 Sensor 2 / Bank 1 Sensor 3
- P2417O2 Sensor Signals Swapped Bank 2 Sensor 2 / Bank 2 Sensor 3
- P2A00O2 Sensor Circuit Range/PerformanceBank 1 Sensor 1
- P2A01O2 Sensor Circuit Range/PerformanceBank 1 Sensor 2
- P2A02O2 Sensor Circuit Range/PerformanceBank 1 Sensor 3
- P2A03O2 Sensor Circuit Range/PerformanceBank 2 Sensor 1
- P2A04O2 Sensor Circuit Range/PerformanceBank 2 Sensor 2
- P2A05O2 Sensor Circuit Range/PerformanceBank 2 Sensor 3
Related codes
Checked on · Rafael Soares
These are the generic meanings every manufacturer shares. Each brand adds its own detail, so your car's handbook, its service information and a qualified mechanic have the last word. OdoKeep has no connection with any manufacturer, and the app does not read codes from the car.
