P2197 - OXYGEN SENSOR SIGNAL BIASED / STUCK LEAN BANK 2 SENSOR 1
Description of DTC code P2197
The Powertrain Control Module (PCM) checks that the air/fuel ratio is the required ratio. To do this, it uses the Oxygen Sensors (O2), which generate a voltage reading that the PCM uses to make the necessary mixture adjustments.
If the air/fuel ratio read by the PCM indicates that it is excessively lean and cannot be adjusted by the PCM, set the DTC P2197 OBD2 code.
Symptoms of fault code P2197
- Check Engine Lamp illuminated.
- Low power output.
- The engine may overheat.
Causes of OBD2 P2197
Reasons for setting the P2197 OBDII diagnostic code:
- The Oxygen Sensor number 1 on bank 2 could be faulty.
- The O2 Sensor 1 circuit in bank 2 may be shorted.
- There may be damage to the fuel injectors.
- Intake air may be leaking.
- The Mass Air Flow (MAF) sensor may be damaged.
- Maybe the Coolant Temperature Sensor (ECT) is bad.
Possible solutions of the DTC code P2197
To troubleshoot the problems associated with the P2197 OBD2 error code, consider this:
- Check the cables and connectors that are related to the Oxygen Sensor. Fix or replace as needed.
- Use a multimeter to check that the O2 Sensor circuit is not shorted to the ground or power supply. Make adjustments if necessary.
- Replace the Oxygen Sensor.
- Check the vacuum lines and make sure there are no leaks. Replace any defective lines.
- With a voltmeter, check the values of the Air Mass Flow Sensor and Coolant Temperature Sensor. Replace if not as specified by the manufacturer.