how to fix P0301 code in Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Noid light
• Multimeter

2. Replace Ignition Coil and Spark Plug

1. Locate the ignition coil and spark plug for cylinder 1 (usually the first cylinder on the engine).
2. Remove the engine cover if applicable.
3. Disconnect the electrical connector from the ignition coil.
4. Remove the ignition coil by unscrewing the mounting bolts.
5. Carefully remove the spark plug using a spark plug socket.
6. Inspect the old spark plug for wear or damage and compare it to specifications.
7. Install the new spark plug with the correct gap (typically 0.028-0.032 inches).
8. Reinstall the ignition coil and secure it with the mounting bolts.
9. Reconnect the electrical connector to the ignition coil.

3. Test Fuel Injector

1. Connect a noid light to the fuel injector connector for cylinder 1.
2. Crank the engine and check the noid light for proper flashing, indicating injector operation.
3. If no signal is detected, further diagnose the wiring or engine control unit (ECU).

4. Compression Test

1. Remove the spark plug from cylinder 1.
2. Insert a compression tester into the spark plug hole.
3. Crank the engine several times while observing the compression gauge.
4. Compare the reading to the manufacturer's specifications (usually around 180 psi).
5. If compression is low, investigate potential internal engine issues or valve problems.