why does my Ram 1500 DT (2019-Present) keep throwing P0301 code?

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before proceeding with any repairs.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, multimeter
• Remove the ignition coil from cylinder 1 by unbolting it from the engine and disconnecting the electrical connector.
• Inspect the ignition coil for cracks or signs of wear; replace if necessary.
• Remove the spark plug from cylinder 1 using a spark plug socket.
• Inspect the spark plug for wear; replace it with a new spark plug if it's damaged or fouled.
• Reinstall the spark plug and torque it to the manufacturer’s specifications (typically 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Test Fuel Injector

• Tools Required: Fuel pressure gauge, injector cleaning kit (if needed)
• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to check the injector's resistance; replace it if out of specification.
• Perform a fuel injector cleaning if necessary or replace with a new injector.
• Reconnect the fuel injector and ensure it is seated properly.

4. Conduct Compression Test

• Tools Required: Compression tester
• Remove the spark plug from cylinder 1 again.
• Insert the compression tester into the spark plug hole.
• Crank the engine several times to obtain a reading.
• Compare the reading to the manufacturer's specifications; if low, further diagnostics may be needed for internal engine issues.

5. Check for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner
• Inspect all vacuum lines and connections around the intake manifold.
• Use a smoke machine to check for leaks or spray carburetor cleaner around suspected areas while the engine is idling to detect changes in RPMs.