What P2197 means
O2 Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
Common causes (general)
Before spending money on parts, verify the code with a scan tool and read freeze frame data. Freeze frame captures every sensor value at the moment the code set — this is often enough to figure out the root cause without further testing.
Manufacturer-specific descriptions
Different manufacturers use this code for slightly different failure modes. Here's what your specific make means by P2197:
| BMW | O2 Sensor Signal Stuck Lean |
| HONDA | Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Signal Stuck Lean |
| MITSUBISHI | Oxygen sensor2(front) inactive |
Read this code on your own car
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