how to diagnose and fix a P0302 code in Toyota RAV4 XA40 (2013-2018)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the spark plug for cylinder 2 using the spark plug socket.
• Inspect the old spark plug for signs of wear or damage.
• Install the new spark plug, torquing it to 13 lb-ft (17 Nm) to avoid damage.

3. Inspect or Replace Ignition Coil

• Tools Required: Ratchet set.
• Remove the ignition coil for cylinder 2 by unscrewing the retaining bolts.
• Inspect the coil for cracks or damage. If defective, replace it with a new ignition coil.
• Reinstall the ignition coil and ensure it is securely fastened.

4. Check Fuel Injector

• Tools Required: Fuel injector removal tool, multimeter.
• Disconnect the fuel injector connector for cylinder 2.
• Use a multimeter to check the injector's resistance. Refer to specifications (typically around 12-16 ohms).
• If the injector is faulty, remove it using the fuel injector removal tool and replace it with a new one.
• Reconnect the fuel injector harness.

5. Perform Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug for cylinder 2 and attach the compression gauge.
• Crank the engine a few times and record the compression reading. It should be within the manufacturer’s specified range (typically around 180 psi).
• If compression is low, further diagnosis is needed for potential internal engine problems.