what does code P0301 mean for my Toyota Corolla E170 (2013-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool and disconnect the battery to prevent electrical shock.
• Gather safety equipment such as gloves and goggles.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the ignition coil on cylinder 1:
  • Disconnect the electrical connector.
  • Unbolt the ignition coil using the socket set.
• Remove the spark plug:
  • Use the spark plug socket and ratchet to unscrew the spark plug.
• Inspect the spark plug for fouling or damage; replace if necessary.
• Install a new spark plug:
  • Apply anti-seize compound on the threads (optional).
  • Torque the spark plug to manufacturer specifications (typically 13-16 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Test Ignition Coil

• Tools Required: Multimeter.
• Perform a resistance test on the ignition coil:
  • Refer to the service manual for specifications.
  • Replace the ignition coil if it fails the test.

4. Check Fuel Injector

• Tools Required: Fuel pressure gauge, injector cleaning kit.
• Connect the fuel pressure gauge to the fuel rail.
• Verify the fuel pressure matches specifications.
• If pressure is low, inspect the fuel injector:
  • Remove the fuel injector from cylinder 1.
  • Test for proper operation using an injector cleaning kit; replace if faulty.

5. Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine and record the compression reading.
• Compare to manufacturer specifications, replace engine components if readings are low.