Error Code P0619 is defined as Alternative Fuel Control Module RAM/ROM Error, meaning there’s a problem in the alternative fuel control module RAM/ROM, likely caused by its malfunction, or faulty wiring within the CAN bus harness.
This code is a generic trouble code, meaning it applies to all cars equipped with the OBD-II system, especially those made since 1996 up to present. This includes cars from, but not limited to, Chrysler, Dodge, Ford, etc. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model to another.
However, this code is exclusive to cars that use alternative fuels like natural gas and electricity for propulsion.
When Error Code P0619 is stored, this means the PCM (powertrain control module, also known as ECM or engine control module in other 2018 Dodge Durango makes), has seen a malfunction in the AFCM (Alternative Fuel Control Module). This problem has occurred in the random access memory (RAM)/read-only memory (ROM) portion of the AFCM.
A single module, increasing the efficiency of the controller and saving automakers space and money.
The KAM works by allowing the PCM and other controllers to keep data even when the ignition is turned off, or the battery is briefly interrupted.
Every time the ignition is turned on and the PCM is energized, multiple controllers perform self-tests. Aside from running internal controller self-tests, the CAN (controller area network) is used to compare signals from the individual module, ensuring various controllers are working and interacting properly.
If a problem is detected when monitoring AFCM/PCM KAM capacity, then Error Code P0618 will be stored, and simultaneously activating the Check Engine light. Depending on the severity of the problem, it may take multiple drive cycles for the Check Engine light to light up.
This code causes 2018 Dodge Durango drivability issues, such as:
Other stored code may be present
Common causes for this code include:
This code is one of the many tricky codes to diagnose and fix, even with professional technicians. Also, reprogramming issue must also be considered. Without the right reprogramming equipment, it will be impossible to replace a defective controller and complete the repair.
If there are other AFCM/PCM codes present, then they must be addressed first before diagnosing P0169
Start the diagnosis by connecting the OBD-II scanner, read the codes stored in the PCM and see if any related codes may be the root of the problem. After reading all saved codes, do a visual inspection of all circuits and wirings. Check the connectors and wirings using an ohmmeter to ensure there are no open or short circuits.
Then, check the PCM, CAN bus, and other relevant components.
When trying to diagnose this code, refer to your information source or TSB (technical service bulletin); looks for signs and symptoms parallel to the stored code. Search for the year, make, model, and engine of your 2018 Dodge Durango . If you can find the right TSB, then you may get the best diagnostic information about your problem.
Use 2018 Dodge Durango information source to obtain component locations, connector face views, connector pin-out charts, wiring diagram, and diagnostic flow chart related to your 2018 Dodge Durango ’s error code.
Then, use the DVOM to the test controller power supply fuses and relays. Next, test and replace any blown fuses as necessary. Fuses must be tested with circuit loaded.
If all fuses and relays are running well, check whether the controller related wiring and harness are in order. You may also want to check chassis and engine ground junctions. Again, use your 2018 Dodge Durango information source to obtain ground locations as related circuits. Test ground integrity using the DVOM.
Then, check the system controllers for any signs of water, heat, or collision damage. Any controller that is damaged, especially by water, is considered defective and must be replaced.
If controller power and ground circuits are intact, then there’s a good chance the controller is defective, or there’s a programming error in the controller. Thus, controller replacement requires reprogramming. In some cases, you may want to get aftermarket reprogrammed controllers. Some cars and controllers require on-board reprogramming that may be done only through the dealership or a qualified shop.
Depending on your diagnosis, common repairs for this code include:
When left unfixed, this code could lead to engine misfires, acceleration problems, increase in fuel consumption, and could potentially damage the engine. Thus, it must be addressed as soon as possible.