What P2196 means
O2 Sensor Signal Biased/Stuck Rich Bank 1 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 P2196:
| BMW | O2 Sensor Signal Stuck Rich |
Read this code on your own car
DIY Fix My Car reads P2196 plus 25,000+ other DTC codes with manufacturer-specific descriptions. Includes freeze frame data, likely fix parts, and AI mechanic chat. Download free.