how to troubleshoot P0302 code on Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, fuel injector cleaning kit.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Inspect and Replace Ignition Components

1. Remove the Engine Cover:

   • Use a socket set to remove any bolts securing the engine cover.
   • Carefully lift the cover off and set it aside.

2. Access Cylinder 2 Ignition Coil and Spark Plug:

   • Locate the ignition coil for cylinder 2 (refer to the service manual for exact location).
   • Disconnect the electrical connector from the ignition coil.

3. Remove Ignition Coil:

   • Unscrew the bolts securing the ignition coil using the socket set.
   • Gently pull the ignition coil out from the cylinder head.

4. Remove and Inspect Spark Plug:

   • Use a spark plug socket to remove the spark plug from cylinder 2.
   • Check for signs of wear, carbon buildup, or damage.

5. Replace Ignition Coil and Spark Plug:

   • Install a new spark plug (ensure it is gapped correctly per specifications).
   • Install the new ignition coil and tighten it to the manufacturer’s torque specifications.
   • Reconnect the electrical connector to the ignition coil.

3. Check for Fuel Injector Issues

1. Remove Fuel Injector:

   • Disconnect the fuel line (use a fuel line disconnect tool if required).
   • Unscrew the mounting bolts for the fuel rail and gently lift it to access the fuel injector.
   • Remove the injector from the rail.

2. Clean or Replace Injector:

   • If cleaning, use a fuel injector cleaning kit to service the injector.
   • If replacing, install a new fuel injector ensuring O-rings are lubricated.

3. Reassemble Fuel System:

   • Reattach the fuel rail, ensuring all bolts are properly tightened and the fuel line is securely connected.