Technical Definition:
Oxygen (O2) Sensor Signal Biased / Stuck Lean (Bank 2 – Sensor 1)
Trouble Code: P2197
Address: 0x2197
System: Powertrain
Subsystem: Fuel and Air Metering
Address: 0x2197
System: Powertrain
Subsystem: Fuel and Air Metering
Technical Description:
This code is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model.
Possible Causes:
- 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)
- Fuel pressure too high or too low
- PCV system leak/fault
- A/F sensor relay faulty
- MAF sensor malfunction
- ECT sensor malfunction
- Fuel pressure too low
- Fuel leak
- Air suction in air intake system
Possible Symptoms:
O2 Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1