my Ram 1500 DT (2019-Present) engine light is on with code P0301, what does it mean?

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector tester.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shock.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if applicable.
2. Use a socket wrench to remove the spark plug from cylinder one.
3. Inspect the spark plug for wear, carbon buildup, or damage.
4. If necessary, replace the spark plug with a new one, ensuring it is gapped to manufacturer specifications (usually around 0.040 inches).
5. Torque the new spark plug to the manufacturer’s specification (typically around 15 ft-lbs).

3. Inspect and Replace Ignition Coil

1. Disconnect the wiring harness from the ignition coil on cylinder one.
2. Remove the ignition coil from the engine.
3. Inspect the coil for cracks or signs of overheating.
4. If faulty, replace the ignition coil with a new one.
5. Reinstall the ignition coil and reconnect the wiring harness.

4. Check Fuel Injector

1. Disconnect the fuel injector connector for cylinder one.
2. Use a multimeter to check for proper resistance; compare to specifications (usually 12-16 ohms).
3. If the injector is faulty, remove it and replace it with a new one.
4. Reconnect the fuel injector connector.

5. Perform Compression Test

1. Remove the spark plug from cylinder one.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine for a few seconds and note the reading.
4. Compare the reading to the manufacturer’s specifications. If low, further investigation is needed for internal engine issues.

6. Reassemble and Reset Codes

1. Reinstall any components that were removed.
2. Reconnect the battery.
3. Use the OBD-II scanner to clear the trouble codes.
4. Start the engine and monitor for any issues.