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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (5.7L - DTCS P063A To P2127 - NGC - 3500 Cab & Chassis) >> Diagnosis and Testing >> P2097-Downstream Fuel Trim System 1 Rich >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. ACTIVE DIAGNOSTIC TROUBLE CODE (DTC) 
    NOTE:

    Check the vehicle repair history. If the 1/2 O2 has been replaced make sure that the O2 sensor was properly installed and meets OEM specification.

    NOTE:

    Check for contaminants that may have damaged the O2 Sensor: contaminated fuel, unapproved silicone, oil and coolant.

    1. Start the engine.
    2. Allow the engine to reach normal operating temperature.
    3. With a scan tool, select View DTCs.
      NOTE:

      It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data.

      Is the DTC Active or Pending at this time?

      Yes 

      • Go To  2.

      No 

  2. CHECKING THE EXHAUST SYSTEM FOR LEAKS 
    NOTE:

    A thorough exhaust leak test must be completed before removing an O2 Sensor or any other part from the exhaust system. Do not remove any parts before an exhaust leak check has been completed.

    NOTE:

    An exhaust leak may cause downstream fuel adaptives to rail out, resulting in a false O2 Sensor failure

    1. Turn the ignition off.
    2. Raise the vehicle in accordance with the Service Information.
      WARNING:

      The normal operating temperature of the exhaust system is very high. Never work around or attempt to service any part of the exhaust system until it has cooled. Special care should be taken when working near the catalytic converter. The temperature of the converter rises to a high level after a short period of engine operating time.

    3. Connect Exhaust Cone (special tool #8404-EC, Exhaust Cone) or (special tool #8404-EC, Exhaust Cone) to Air Pressure Regulator (with hose) W-18-MIL-1146AS.
      CAUTION:

      The air pressure must not exceed 27.6 kPa (4 psi), otherwise engine damage can occur.

    4. Attach shop air to the air pressure regulator.
    5. Adjust the Air Pressure Regulator to 27.6 kPa (4 psi).
    6. Insert the exhaust cone into the vehicle tail pipe.
    7. If the vehicle is equipped with dual exhaust. Use the (special tool #8404-ECT, Exhaust Cone, Truck) with equipped attached plug, plug one side of the dual exhaust pipe. Pressurize the other as described above.
    8. Apply Mopar® Air Leak Detector PN# 05191804AA (or an equivalent leak finder liquid) to the following areas:
      • All welded joints from the exhaust manifold to 152.4 mm (6 inches) behind the downstream O2 sensor
      • O2 sensor seal points
      • O2 sensor boss welds
      • Flange/joint connection(s)
      • Exhaust manifold to cylinder head connection(s)
      • EGR solenoid gasket base and tube seal points (if equipped)
    9. Watch for the liquid/soapy water to bubble.
    10. Use the following definitions to help determine if system or component repair/replacement is necessary:

      Type 1 Leak  is defined as a leak where very small foam like bubbles 1 mm (0.04 of an inch) or less appear.

      Any Type 1 or greater leaks found in welded joints, O2 sensor seal points or O2 sensor boss welds must be repaired or the component must be replaced.

      Type 2 Leak  is defined as a leak where larger bubbles pea size, 8 mm (0.3 of an inch) or greater appear.

      Any Type 2 or greater leaks found in flange or joint connections, exhaust manifold to cylinder head connections, or EGR gasket and tube seal points must be repaired or the components must be replaced.

      Leak Location  Repair required if results at 27.6 kPa (4 psi) reveal bubble size: 
      Welded joints Type 1, 1 mm (0.04 of an inch) or greater
      O2 Sensor seal points Type 1, 1 mm (0.04 of an inch) or greater
      O2 Sensor boss welds Type 1, 1 mm (0.04 of an inch) or greater
      Flange / joint connections Type 2, 8 mm (0.3 of an inch) or greater
      Exhaust Manifold to cylinder head connections Type 2, 8 mm (0.3 of an inch) or greater
      EGR gasket and tube seal points Type 2, 8 mm (0.3 of an inch) or greater
    11. If a leak is found that matches the above definition, repair or replace the component as necessary.
    12. Once the repair is complete, repeat the procedure to verify that all leaks have been repaired.

      Were any exhaust leaks found?

      Yes 

      • Repair or replace the leaking exhaust parts as necessary.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  3.
  3. CHECKING THE FUEL DELIVERY SYSTEM 
    1. Perform the diagnostic procedure for CHECKING THE FUEL DELIVERY SYSTEM. Refer to CHECKING THE FUEL DELIVERY SYSTEM .

      Were any problems found?

      Yes 

      • Repair as necessary in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  4.
  4. CHECKING THE OXYGEN SENSOR OPERATION 
    1. Perform the diagnostic procedure for CHECKING THE OXYGEN SENSOR OPERATION. Refer to CHECKING THE OXYGEN SENSOR OPERATION .

      Were any problems found?

      Yes 

      • Repair as necessary in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  5.
  5. ENGINE MECHANICAL 
    1. Check for any of the following conditions/mechanical problems:
      • AIR INDUCTION SYSTEM - must be free from leaks
      • ENGINE VACUUM - must be at least 13 inches in neutral
      • ENGINE VALVE TIMING - must be within specifications
      • ENGINE COMPRESSION - must be within specifications
      • ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks
      • ENGINE PCV SYSTEM - must flow freely
      • TORQUE CONVERTER STALL SPEED - must be within specifications
      • POWER BRAKE BOOSTER - no internal vacuum leaks
      • FUEL - must be free of contamination
      • FUEL INJECTOR - plugged or restricted injector; control wire not connected to correct injector

      Are there any engine mechanical problems?

      Yes 

      No 

      • Go To  6.
  6. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors relative to the components tested in this procedure.
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals.
    4. Monitor the scan tool data relative to the components tested in this procedure and wiggle test the wiring and connectors.
    5. Look for the data to change or for a DTC to set during the wiggle test.
    6. Perform any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

      • Replace and program the PCM in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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