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.

NOTE:

If other EGR related DTCs are present and active, repair those DTCs before proceeding.

ACTIVE DTCS
1. Ignition on, engine not running.
2. With the scan tool, check for active DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE THERMOSTAT OUTLET FOR A RESTRICTION
1. Turn the ignition off.
2. Remove the Exhaust Gas Pressure sensor from the thermostat outlet.
3. Inspect the Exhaust Gas Pressure sensor and the thermostat outlet for build up or debris.
  Are the Exhaust Gas Pressure Sensor and the thermostat outlet free of debris?
  
  Yes
  - Go To 3.
  No
  - Remove debris from Exhaust Gas Pressure Sensor and the thermostat outlet.
  - Go To 3.
CHECK THE EXHAUST GAS PRESSURE SENSOR TUBE
1. Remove the steel tube from the exhaust manifold to the Exhaust Gas Pressure Sensor port.
  Is the tube free from debris?
  
  Yes
  - Go To 4.
  No
  - Clean the tube and reinstall.
  - Go To 4.
CHECK THE EXHAUST SYSTEM
1. Perform the CHECKING THE EXHAUST SYSTEM FOR LEAKS diagnostic procedure. Refer to Diagnosis and Testing , 6.7L .
  Was an Exhaust System leak found?
  
  Yes
  - Repair the Exhaust System leak.
  - Perform the DIESEL AFTERTREATMENT VALIDATION - 6.7L procedure. Refer to DIESEL AFTERTREATMENT VALIDATION- 6.7L .
  No
  - Go To 5.
CHECK THE INTAKE SYSTEM
1. Perform INTAKE AIR SYSTEM PRESSURE TEST diagnostic procedure. Refer to Diagnosis and Testing , 6.7L .
  Was an Intake System leak found?
  
  Yes
  - Repair the Intake Air System leak.
  - Perform the DIESEL AFTERTREATMENT VALIDATION - 6.7L procedure. Refer to DIESEL AFTERTREATMENT VALIDATION- 6.7L .
  No
  - Go To 6.
CHECK THE EGR AIRFLOW THROTTLE CONTROL VALVE
1. Remove the boot from the EGR Throttle Control Valve. Using a mirror, look at the butterfly valve on the inside of the EGR Throttle Control Valve.
2. Start the vehicle, let idle for 10 seconds.
3. Turn ignition off.
  NOTE:
  If functioning properly the EGR Throttle Control Valve will close immediately after the engine is shut down.
  
  Did the EGR Throttle Control Valve close immediately after the engine was shut down?
  
  Yes
  - Go To 7.
  No
  - Replace the EGR Airflow Control Valve in accordance with the service information.
  - Perform the DIESEL AFTERTREATMENT VALIDATION - 6.7L procedure. Refer to DIESEL AFTERTREATMENT VALIDATION- 6.7L .
CHECK THE EGR VALVE
1. Ignition on, engine not running.
2. With the scan tool, erase DTC.
3. Turn the ignition off for 75 seconds.
4. Start engine and let idle to operating temperature.
  Is DTC still active?
  
  Yes
  - Remove and clean the EGR valve with Mopar EGR Valve cleaner. Refer to Turbocharger System , Cleaning , 6.7L .
  - Go To 8.
  No
  - Repair complete.
  - Perform the DIESEL AFTERTREATMENT VALIDATION - 6.7L procedure. Refer to DIESEL AFTERTREATMENT VALIDATION- 6.7L .
ACTIVE DTC
1. Ignition on, engine not running.
2. With the scan tool, erase DTC.
3. Turn the ignition off for 75 seconds.
4. Start engine and let idle to operating temperature.
  Is DTC still active?
  
  Yes
  - Replace EGR Valve in accordance with the service information.
  - Perform the DIESEL AFTERTREATMENT VALIDATION - 6.7L procedure. Refer to DIESEL AFTERTREATMENT VALIDATION- 6.7L .
  No
  - Repair complete.
  - Perform the DIESEL AFTERTREATMENT VALIDATION - 6.7L procedure. Refer to DIESEL AFTERTREATMENT VALIDATION- 6.7L .