P2195 - O2 SENSOR SIGNAL STUCK LEAN BANK 1 SENSOR 1

The vehicle computer monitors the air/fuel ratio of the exhaust. It uses Oxygen (O2) Sensors to maintain the proper air/fuel ratio, i.e. 14.7:1, through the fuel system.

The O2 Sensor produces a voltage reading that is used by the PCM (Powertrain Control Module). If the PCM reads that the actual air/fuel ratio is well within the required range so that the PCM cannot make adjustments, it sets the DTC code P2195 OBDII.

• Check Engine lamp illumination.
• Abrupt motor operation.

The factors for which the fault code P2195 OBD2 is stored are

• Bank 1 Oxygen Sensor 1 may be defective.
• The O2 Sensor circuit may be open or shorted.
• Deficient fuel injectors.
• Intake air leaks.
• The Positive Crankcase Ventilation (PCV) system may leak.
• A malfunction of the Mass Airflow (MAF) sensor may be a problem.

Before setting the diagnostic code P2195 OBDII, you must do the following to correct it:

• With a scanner, get the Oxygen Sensor readings and observe the fuel setting values. Compare with the manufacturer's data, and if there are differences you should make the respective adjustments.
• Check the O2 Sensor circuit for a short to ground or power. Repair damaged cables or connectors.
• Inspect vacuum lines and check for leaks. Change the line that has damage.
• Make a fuel pressure test, the result obtained should be compared with the manufacturer's specifications. If the actual pressure does not meet the specified, repair.
• Use a voltmeter to check the proper functioning of the MAF Sensor. Replace it if it does not meet the recommendations given by the manufacturer.
• Replace the Oxygen Sensor.