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Home >> Chrysler >> 2009 >> 300 LX >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P2107 To P2302 >> P2271-O2 Sensor 1/2 Signal Biased Rich >> Diagnostic Test

Diagnostic Test

  1. DTC IS ACTIVE 
    1. Start the engine and allow it to reach operating temperature.
      WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.
      NOTE: It may be necessary to test drive the vehicle within the DTC monitoring conditions in order for this DTC to set.
    2. With a scan tool, select View DTCs.

      Is the status Active for this DTC?

      Yes 

      • Go to step  2

      No 

  2. CHECKING THE EXHAUST SYSTEM FOR LEAKS 
    1. Perform the diagnostic procedure for CHECKING THE EXHAUST SYSTEM FOR LEAKS .

      Were any problems found?

      Yes 

      No 

      • Go to step  3
  3. CHECKING THE OXYGEN SENSOR OPERATION 
    NOTE: Check for signs of contaminants that may have damaged the O2 Sensor, such as contaminated fuel, unapproved silicone, oil and coolant.
    1. Perform the diagnostic procedure for CHECKING THE OXYGEN SENSOR OPERATION .

      Were any problems found?

      Yes 

      No 

      • Go to step  4
  4. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the 1/2 Oxygen Sensor and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals.
    4. Refer to any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

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