how to diagnose a P0302 code on my Toyota Camry Seventh Generation (2012-2017)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, multimeter, compression tester, fuel pressure gauge.
• Ensure the vehicle is in a safe working environment and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Ignition Components

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the electrical connector from the ignition coil for cylinder 2.
  3. Remove the ignition coil using a socket wrench.
  4. Inspect the spark plug for wear or damage; replace it if necessary.
  5. Install a new ignition coil, ensuring it is securely connected.
  6. Reconnect the battery terminal.

3. Test and Replace Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 2.
  2. Use a multimeter to test the resistance of the fuel injector; compare it to manufacturer specifications.
  3. If faulty, remove the old fuel injector using appropriate tools.
  4. Install a new fuel injector and reconnect the connector.

4. Check Compression

• Sub-steps:
  1. Remove the spark plug for cylinder 2.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine and observe the compression reading.
  4. If the compression is low, investigate potential causes such as valve issues or head gasket failure.

5. Inspect for Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold.
  2. Use a smoke machine or carburetor cleaner to check for leaks.
  3. Replace any damaged hoses or gaskets found during inspection.