how to troubleshoot P0302 code in Ram 1500 DT (2019-Present)?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Locate the spark plug for cylinder 2.
  3. Use a socket wrench to remove the spark plug.
  4. Inspect the spark plug for signs of wear or fouling.
  5. If damaged, replace it with a new spark plug with the manufacturer’s specified gap.
  6. Torque the new spark plug to the manufacturer’s specifications (typically 13-15 lb-ft).

3. Check and Replace Ignition Coil

• Sub-steps:
  1. Remove the ignition coil connector.
  2. Unbolt and remove the ignition coil from cylinder 2.
  3. Inspect the coil for cracks or signs of damage.
  4. Replace the ignition coil if defective.
  5. Reinstall the ignition coil and reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 2.
  2. Remove the fuel rail if necessary to access the fuel injector.
  3. Inspect the injector for clogs or leaks.
  4. Clean the injector with an appropriate cleaner or replace it if necessary.
  5. Reinstall the injector and reconnect the fuel rail and electrical connector.

5. Compression Testing

• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Insert a compression tester into the spark plug hole.
  3. Crank the engine and record the compression reading.
  4. Compare the reading to the manufacturer’s specifications. If low, further diagnosis may be needed for engine internals.