my Toyota RAV4 has a check engine light with code P0302 what does it mean

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, and vacuum gauge.
• Ensure the vehicle is parked on a flat surface and the engine is cool.

2. Inspect and Replace Spark Plug

• Remove Engine Cover (if applicable):
  • Use a socket set to remove any bolts holding the engine cover in place.
• Remove Spark Plug:
  • Disconnect the ignition coil connector for cylinder 2.
  • Use a socket wrench to remove the spark plug from cylinder 2.
• Inspect Spark Plug:
  • Check the spark plug for signs of wear, carbon buildup, or damage.
• Install New Spark Plug:
  • Use a torque wrench to tighten the new spark plug to the manufacturer’s specification (typically around 13-15 ft-lbs).

3. Inspect and Replace Ignition Coil

• Remove Ignition Coil:
  • Unscrew the bolts holding the ignition coil in place and gently pull it from the spark plug.
• Inspect Ignition Coil:
  • Check for cracks or signs of arcing.
• Install New Ignition Coil:
  • Position the new ignition coil and secure it with bolts. Connect the electrical connector.

4. Check and Replace Fuel Injector (if necessary)

• Remove Fuel Rail (if applicable):
  • Relieve fuel pressure and disconnect the fuel lines.
  • Remove any bolts securing the fuel rail and gently lift it off.
• Remove Fuel Injector:
  • Pull out the fuel injector from the fuel rail and inspect it for clogs or damage.
• Install New Fuel Injector:
  • Lubricate the O-ring on the new fuel injector with engine oil and insert it into the fuel rail.

5. Verify and Reassemble

• Reattach Fuel Rail and Components:
  • Reconnect the fuel lines and secure the fuel rail with bolts.
• Reconnect Battery:
  • Ensure all connections are secure and reconnect the battery.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Multimeter
• Compression tester
• Vacuum gauge

Parts Required:

• Spark plug for cylinder 2
• Ignition coil for cylinder 2
• Fuel injector for cylinder 2 (if needed)

Estimated Repair Time: 2-4 hours

Safety Warnings:

• Disconnect the battery before working on electrical systems.
• Relieve fuel pressure before disconnecting fuel lines to avoid sprays.