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How to repair multiple problems that occur when a truck won’t start

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If you are the owner of a 2020 RAM 2500 with the 6.7L Cummins, and hear a loud click one morning when you go to start your rig, there are a few culprits that could be causing this no-start issue.

Furthermore, if you get one of the following two messages, chances are this article can help immensely. The first is a “Service Electronic Throttle Control” warning, and the second is a “Fuel Filter Service Required” light.

Here is what we suggest you look for in either case…


There could be a few potential issues causing that Cummins 2500 truck not to start. Here are some suggestions that Spelab Auto Parts recommends trying to troubleshoot these starting issues:

  1. Dead battery

Ensure that the battery has enough charge to start the vehicle. Check the battery terminals for any corrosion or loose connections. If necessary, try jump-starting the truck or charging the battery.

  1. Starter motor issues

The loud clicking sound you hear could indicate a problem with the starter motor. It could be a faulty solenoid or a worn-out starter motor. A mechanic should inspect and test the starter motor to determine if it needs to be repaired or replaced. (See section below.)

  1. Electronic Throttle Control (ETC) System

“Service Electronic Throttle Control” message suggests a potential issue with the ETC system. This system controls the throttle opening electronically, so there could be a fault with a sensor, wiring, or the throttle body itself. An OBD diagnostic scan can help track down any electrical gremlins.

  1. Fuel filter service

The “Fuel Filter Service Required” message indicates that the fuel filter needs to be serviced or replaced. A clogged fuel filter can cause fuel delivery issues and affect the engine’s performance. It is advisable to replace the fuel filter according to the manufacturer’s recommendations or as per your maintenance schedule.

Performing fuel filter service is an essential maintenance task to ensure proper fuel flow and prevent contaminants from entering the engine.

Repairing or replacing a faulty solenoid or worn-out starter motor

Diagnose the problem and gather the necessary tools and parts

Once you’ve identified the faulty component, gather the required tools and replacement parts. Common tools may include wrenches, sockets, screwdrivers, and a multimeter.

Disconnect the battery

Before working on any electrical components, disconnect the negative terminal of the vehicle’s battery to prevent accidental electrical shorts.

Access the solenoid or starter motor

The solenoid and starter motor are usually located near the engine, often mounted on the transmission bell housing or the engine block. Access may require removing other components or protective covers. Consult your vehicle’s service manual.

Remove the faulty component

Disconnect any electrical connections and mounting bolts holding the solenoid or starter motor in place. Take note of the wire connections or take pictures for reference during reassembly.

Install the new component

Install the new solenoid or starter motor in the reverse order of removal. Ensure proper alignment and secure all electrical connections and mounting bolts according to the manufacturer’s specifications.

Reconnect the battery

Once the new component is installed, reconnect the negative terminal of the battery.

Test the repair

Start the vehicle and verify that the solenoid or starter motor operates correctly. Listen for any abnormal noises or signs of malfunction. If the problem persists, further troubleshooting or assistance from a professional may be required.

It’s worth noting that repairing or replacing the solenoid or starter motor can be a complex task, and it’s often recommended to have a qualified mechanic perform the repairs, especially if you’re not experienced with automotive electrical systems.

Fuel filter service

Consult the owner’s manual

Before starting the fuel filter service, refer to your vehicle’s owner’s manual for specific instructions, recommended intervals for fuel filter replacement, and any special precautions.

Gather the necessary tools

Depending on your vehicle, you may need a variety of tools such as a socket set, wrenches, screwdrivers, and possibly a fuel filter removal tool. Ensure you have the right tools before starting the service.

Work in a well-ventilated area

Fuel filter replacement can involve fuel spillage, so it’s crucial to work in a well-ventilated area away from open flames or sparks. Perform the service outdoors or in a well-ventilated garage.

Relieve fuel system pressure

Before replacing the fuel filter, it’s important to relieve the fuel system pressure. Locate the fuel pump relay or fuse in the fuse box and remove it. Start the engine and let it run until it stalls. This will relieve the pressure in the fuel lines.

Locate and remove the old filter

The fuel filter is typically located along the fuel line, either under the vehicle or in the engine compartment. Consult your vehicle’s manual to locate the filter. Use the appropriate tools to remove any retaining clips or bolts and disconnect the fuel lines from the filter.

Install the new filter

Install the new fuel filter in the correct orientation, making sure it is properly aligned and secured. Reconnect the fuel lines and ensure they are securely attached. Replace any retaining clips or bolts that were removed.

Check for leaks

After installing the new fuel filter, turn the ignition to the “On” position (without starting the engine) for a few seconds to prime the fuel system. Check for any fuel leaks around the filter connections. If you notice any leaks, double-check the connections and tighten them if necessary.

Reset the fuel filter service indicator

Some vehicles have a fuel filter service indicator that needs to be reset after replacing the filter. Refer to your vehicle’s manual for instructions on how to reset the indicator if applicable.

If you are uncertain about performing the fuel filter service yourself, it is recommended to consult a qualified mechanic or take your vehicle to an authorized service center to ensure the job is done correctly.


Given that a 2020 RAM 2500 truck is relatively new and likely has low mileage, it’s possible that these issues may be covered under warranty. Contact your local dealership or an authorized service center for assistance. They can provide specific guidance and perform a thorough diagnosis to address the problems you’re experiencing.

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