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

Solution

1. Preparation

• Gather 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 Spark Plug and Ignition Coil

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover if necessary.
• Disconnect the ignition coil connector for cylinder 2.
• Remove the ignition coil using a socket and inspect it for damage or wear.
• Remove the spark plug using a spark plug socket and inspect it for signs of fouling, wear, or damage.
• Replace the spark plug if damaged and reinstall the ignition coil, ensuring it is properly seated and connected.

3. Check Fuel Injector

• Tools Required: Fuel pressure gauge, multimeter
• Disconnect the fuel injector connector for cylinder 2.
• Use a multimeter to check for continuity and proper voltage at the injector connector.
• If no voltage is present, trace wiring back to the power source.
• If the injector is faulty, replace it by removing any securing clips and disconnecting it from the fuel rail.

4. Perform Compression Test

• Tools Required: Compression tester
• Remove the spark plug for cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine for several seconds and record the compression reading.
• Compare the reading to the manufacturer's specifications. If low, inspect for internal engine issues (e.g., valves, piston rings).

5. Inspect Wiring and Connectors

• Visually inspect the wiring harness and connectors related to the ignition coil and fuel injector for damage or corrosion.
• Repair any damaged wiring or connections found during the inspection.