how to fix P0303 code on Honda CR-V Fifth Generation (2017-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before working on the ignition system.

2. Inspect and Replace Spark Plug

• Remove the ignition coil for cylinder 3 using a socket set.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear; replace if necessary.
  • Tools Required: Spark plug socket, ratchet, torque wrench
  • Safety Warnings: Ensure the engine is cool to prevent burns.

3. Inspect and Replace Ignition Coil

• Check the ignition coil for cylinder 3 for cracks or damage.
• If faulty, remove the ignition coil and replace it with a new one.
  • Torque the mounting bolts to the manufacturer’s specifications.

4. Test Fuel Injector

• Disconnect the fuel injector connector for cylinder 3.
• Use a noid light to check for signal; if no signal, inspect wiring for damage.
• If the injector is not functioning, replace it with a new unit.
  • Tools Required: Noid light, multimeter, basic hand tools

5. Compression Test

• If misfire persists, perform a compression test on cylinder 3.
• If readings are low, investigate for possible internal engine issues such as a blown head gasket or damaged piston rings.