how to diagnose a P0302 code on my Ram 1500 DT (2019-Present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Allow the engine to cool before starting any work.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, multimeter
• Remove the engine cover (if applicable).
• Unplug the ignition coil connector from the ignition coil on cylinder 2.
• Remove the ignition coil from the cylinder head.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear, deposits, or damage; replace if necessary (gap to manufacturer specification).
• Install a new ignition coil and torque it to the manufacturer’s specifications.
• Reconnect the ignition coil connector.

3. Inspect and Replace Fuel Injector

• Tools Required: Fuel injector removal tool, socket set
• Access the fuel rail by removing any necessary components (e.g., engine cover).
• Disconnect the fuel injector connector specific to cylinder 2.
• Remove the fuel rail from the intake manifold.
• Carefully remove the fuel injector from the rail and inspect for clogs or damage.
• Replace the injector if necessary and reinstall the fuel rail.
• Reconnect the fuel injector connector.

4. Check Engine Compression

• Tools Required: Compression tester
• Remove all spark plugs to facilitate accurate compression testing.
• Insert the compression tester into the spark plug hole of cylinder 2.
• Crank the engine and record the compression reading.
• Compare to factory specifications; if low, further inspection is warranted.