how to fix P0301 code on Ram 1500 DT (2019-Present)

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface with the engine off and cooled down.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Gather tools: OBD-II scanner, socket set, multimeter, compression tester, spark plug socket.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Use the spark plug socket to remove the spark plug from cylinder 1.
• Inspect the old spark plug for wear or damage.
• Install the new spark plug (NGK or equivalent) and torque to 13 lb-ft (17.6 Nm).
• Reattach the engine cover.

3. Inspect and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil on cylinder 1.
• Remove the ignition coil using the socket set.
• Test the coil’s resistance with a multimeter; if outside of specs, replace.
• Install a new ignition coil and reconnect the electrical connector.

4. Check Fuel Injector

• Disconnect the injector connector for cylinder 1.
• Use a multimeter to test for voltage while cranking the engine.
• If it’s not receiving power, trace wiring for shorts or breaks.
• If the injector is clogged, remove it and clean or replace as necessary.

5. Conduct Compression Test

• Remove the spark plug again for cylinder 1.
• Insert the compression tester and crank the engine.
• Record the reading; it should be within the manufacturer’s specifications (usually 120-160 psi).
• If low, further investigation of valve seats, piston rings, or head gasket might be needed.