P2196 – O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1)

System: ETCS (throttle)
Dashboard light: Check engine light (MIL)
Check-engine blink code: —
Applies to: Generic OBD-II meaning. Not every code is used by this car.
Description: O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1)
Detection / symptoms: 1.Check engine light on
Possible causes: 1.Potential causes of a P2196 code include 2.Oxygen (O2) or A/F ratio sensor or sensor heater malfunction 3.Open or short in O2 sensor circuit (wiring, harness) 4.Fuel pressure or fuel injector problem 5.Faulty PCM 6.Intake air or engine vacuum leaks 7.Faulty fuel injector(s)
What to check: 1.Read the code with an OBD-II scanner 2.Check the throttle body and pedal sensor connectors 3.Clean a dirty throttle body; do not force the valve by hand 4.Clear the code; some cars need an idle relearn after cleaning
Confidence: medium (generic OBD-II definition, not checked against the factory manual for this car)

Generic OBD-II meaning (obd-codes.com), not checked against this car's factory manual. Clear the code and test-drive to confirm it returns. Search all fault codes · Common problems · Warning lights