Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
NOTE:
This fault can potentially be set by an aftermarket Air Filter Box and/or filter. Non factory filter assemblies are not calibrated to the factory PCM thresholds or settings. If the vehicle has a modified filter assembly and this fault is set, notify the customer that the vehicle needs to be returned back to the stock assembly in order to properly repair the vehicle.

NOTE:
If there are any cylinder misfire, Crank Sensor, MAF/Intake Air Sensor, Boost Pressure Sensor, Differential Pressure Sensor, or Fuel Injector DTCs stored with this fault, perform the diagnostics for those DTCs before proceeding with this test.
1. Turn the ignition on.
2. With the scan tool, record all Freeze frame data.
3. With the scan tool, erase DTCs.
4. Turn the ignition off for 75 seconds.
5. Start the engine and drive the vehicle at 50 MPH. Perform a zero fueling event (decel condition for 10 seconds, with foot off of accelerator pedal). Repeat 3-5 times.
6. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
CHECK THE (K41) O2 SENSOR 1/1 SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Oxygen Sensor harness connector.
3. Disconnect the PCM C1 harness connector.
4. Measure the resistance between ground and the (K41) O2 Sensor 1/1 Signal circuit at the Oxygen Sensor harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 3
  No
  - Repair the (K41) O2 Sensor 1/1 Signal circuit for a short to ground.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
CHECK THE (K41) O2 SENSOR 1/1 SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance between of the (K41) O2 Sensor 1/1 Signal circuit between the Oxygen Sensor harness connector and the PCM C1 harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (K41) O2 Sensor 1/1 Signal circuit for an open/high resistance
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 4
CHECK THE FUEL DELIVERY SYSTEM
1. Reconnect the O2 Sensor 1/1 harness connector.
2. Reconnect the PCM C1 harness connector.
3. Perform the CHECKING THE FUEL DELIVERY SYSTEM diagnostic procedure.
  Were any fuel system problems found?
  
  Yes
  - Perform the appropriate repairs to the fuel system.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 5
CHECK FOR INTAKE AND EXHAUST SYSTEM RESTRICTIONS
1. Turn the ignition off.
2. Inspect the exhaust system for damaged components that could cause exhaust flow blockage.
3. Inspect all air intake, crankcase vent and turbocharger related hoses/tubes and connections for damage, air leaks or blockage.
4. Inspect the air filter for excessive dirt, soiling or other problems that may cause restricted air flow.
  Were any problems found?
  
  Yes
  - Repair or replace as necessary.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 6
CHECK FOR AN EGR SYSTEM LEAK
1. Check for visible signs (soot streaks) of external EGR system leaks around the V-band clamps and connections. Ensure that all torques are within specifications.
  Were any EGR system leaks found?
  
  Yes
  - Perform the appropriate repairs to the EGR system.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 7
CHECK THE O2 SENSOR
NOTE:
Excessive soot build up can be caused by over fueling. If excessive soot build up is present, the fuel system operation should be checked and the O2 sensor should be cleaned.
1. Remove the O2 Sensor.
2. Clean the soot from the O2 Sensor.
3. Reinstall the O2 Sensor.
4. Turn the ignition on.
5. With the scan tool, erase DTCs.
6. Turn the ignition off for 75 seconds.
7. Start the engine and drive the vehicle at 50 MPH. Perform a zero fueling event (decel condition for 10 seconds, with foot off of accelerator pedal). Repeat 3-5 times.
8. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 8
  No
  - Repair complete.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
OXYGEN SENSOR
1. Reconnect the PCM C1 harness connector.
2. Replace the Oxygen Sensor in accordance with the service information.
3. Start the engine.
4. Turn the ignition off for 75 seconds.
5. Start the engine and drive the vehicle at 50 MPH. Perform a zero fueling event (decel condition for 10 seconds, with foot off of accelerator pedal). Repeat 3-5 times.
6. Monitor the scan tool for at least two minutes.
7. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 9
  No
  - Test Complete.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
POWERTRAIN CONTROL MODULE
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Oxygen Sensor and the Powertrain Control Module.
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 this circuit and wiggle test the wiring and connectors.
5. Look for the data to change or for the DTC to reset during the wiggle test.
6. Perform any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Replace the Powertrain Control Module in accordance with the service information. Refer to REMOVAL .
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .