P2196: O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1)
Short answer: P2196 means “O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1)”. It is a standard OBD-II code, so the basic meaning is the same on every car. Below is what it means on each of the 5 cars we cover, with a link to the full page for each car.
Standard OBD-II code Same meaning on all cars (SAE J2012).
P2196 on each car
| Car | Meaning on this car | Confidence |
|---|---|---|
| Toyota Corolla (11th gen, E170) | O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1) | medium |
| Toyota Corolla (10th gen, E140) | O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1) | medium |
| Honda City (5th gen, GM2) | O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1) | medium |
| Honda Civic (10th gen, FC) | O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1) | medium |
| Suzuki Wagon R (Pakistan, K10B) | O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1) | medium |
Symptoms
- Check engine light on
Likely causes
- Potential causes of a P2196 code include
- Oxygen (O2) or A/F ratio sensor or sensor heater malfunction
- Open or short in O2 sensor circuit (wiring, harness)
- Fuel pressure or fuel injector problem
- Faulty PCM
- Intake air or engine vacuum leaks
- Faulty fuel injector(s)
What to check, in order
- Read the code with an OBD-II scanner
- Check the throttle body and pedal sensor connectors
- Clean a dirty throttle body; do not force the valve by hand
- Clear the code; some cars need an idle relearn after cleaning
Causes and checks above are the general meaning. The exact test steps and values differ by car: open your car’s page.