my Ram 1500 DT (2019-Present) has a check engine light and code P0302, what should I do?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Locate the spark plug for cylinder 2.
• Using a spark plug socket, remove the spark plug.
• Inspect the spark plug for wear, carbon buildup, or damage; replace if necessary.
• Install a new spark plug (use manufacturer-recommended specifications) and torque to the specified value (typically around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

• Disconnect the ignition coil connector for cylinder 2.
• Remove the mounting bolts and take out the ignition coil.
• Inspect for cracks or damage; replace if needed.
• Install the new ignition coil, secure it with bolts, and reconnect the wiring harness.

4. Check and Replace Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Remove the injector by unscrewing the retaining clips or bolts.
• Inspect the injector for clogging or damage.
• Replace with a new fuel injector if necessary.
• Reinstall the injector, reconnect the wiring, and ensure it is seated properly.

5. Verify Compression

• Reattach the compression tester to the spark plug hole for cylinder 2.
• Crank the engine to check compression reading; it should be within manufacturer specifications (usually around 120-160 psi).
• If compression is low, further inspection of the engine internals may be required.