what does it mean if my Toyota RAV4 XA40 (2013-2018) has a check engine light with P0302 code?

Solution

1. Preparation

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

2. Inspect Ignition Components

1. Remove Engine Cover (if applicable)
   • Use a socket set to remove any bolts securing the cover.
2. Inspect Spark Plug
   • Remove the spark plug from cylinder 2 using a spark plug socket.
   • Check the condition for signs of wear, fouling, or damage. Replace if necessary.
   • Torque the new spark plug to manufacturer specifications (typically around 13 lb-ft).
3. Check Ignition Coil
   • Disconnect the electrical connector from the ignition coil.
   • Remove the ignition coil and inspect for cracks or damage. Replace if necessary.

3. Test Fuel Injector

1. Remove Fuel Injector Connector
   • Disconnect the electrical connector from the fuel injector for cylinder 2.
2. Test Injector Operation
   • Use a noid light to check for proper voltage to the injector when the ignition is turned on. Replace if no signal is detected.

4. Check Compression

1. Remove Spark Plug
   • Remove the spark plug again from cylinder 2 if not already done.
2. Use Compression Tester
   • Insert the compression tester into the spark plug hole.
   • Crank the engine and record the compression reading. Compare with specifications (typically 180-220 psi).
   • If compression is below specifications, further engine diagnosis may be needed (e.g., valve leaks, head gasket).

5. Inspect for Vacuum Leaks

• Visually inspect vacuum hoses connected to the intake manifold.
• Use a smoke machine or carburetor cleaner to check for leaks while the engine is running.