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

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and ensure the engine is cool before beginning work.
• Disconnect the battery to prevent accidental electrical shorts.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1.
• Use a spark plug socket to remove the spark plug from cylinder 1.
• Inspect the spark plug for wear or damage; replace if necessary.
• Install a new spark plug (torque to manufacturer specifications, typically around 13 lb-ft).

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, reinstall the ignition coil.
• If swapping the coil showed a fault, replace the ignition coil for cylinder 1.
• Reconnect the ignition coil connector.

4. Test and Replace Fuel Injector (if necessary)

• If issues persist, test the fuel injector for cylinder 1.
• Disconnect the fuel injector connector and use a noid light to check for signal.
• If no signal is detected, inspect wiring or replace the injector if it is faulty.

5. Compression Test

• If misfire continues without fault found in ignition or fuel systems, perform a compression test.
• Attach a compression gauge to the spark plug hole of cylinder 1.
• Crank the engine and record the reading; compare it with manufacturer specifications (typically 120-180 psi).
• If compression is low, further inspection of internal engine components may be required.