how to fix P0301 code in Toyota Tacoma N300 (2016-Present)

Solution

1. Preparation

• Gather necessary tools and equipment.
• Disconnect the negative battery terminal to prevent electrical accidents.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if present.
2. Locate and remove the ignition coil from cylinder 1.
   • Tools required: Ratchet and socket set.
3. Remove the spark plug using a spark plug socket.
4. Inspect the spark plug for wear, damage, or carbon buildup.
5. If necessary, replace the spark plug with a new one (OEM recommended).
6. Reinstall the ignition coil and engine cover.

3. Inspect and Replace Ignition Coil

1. If the spark plug is in good condition, check the ignition coil for damage or malfunction.
2. Replace the ignition coil for cylinder 1 if needed.
   • Tools required: Ratchet and socket set.
3. Reconnect the ignition coil harness.

4. Clean or Replace Fuel Injector

1. Disconnect the fuel rail and remove the injector for cylinder 1.
   • Tools required: Ratchet and socket set, fuel line disconnect tool.
2. Clean the fuel injector with an appropriate cleaner or replace it if malfunctioning.
3. Reinstall the fuel injector and ensure all connections are secure.

5. Perform a Compression Test

1. Connect a compression gauge to the spark plug hole of cylinder 1.
2. Crank the engine and record the compression reading.
3. Compare the reading with manufacturer specifications. If low, further investigation into internal engine components may be required.

6. Reassemble and Reconnect

• Reinstall any components removed during the process.
• Reconnect the negative battery terminal.