how to fix P0301 code in Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shocks.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover if necessary.
• Use a spark plug socket to remove the spark plug from cylinder 1.
• Inspect the old spark plug for signs of wear (e.g., worn electrode, oil deposits).
• Install a new spark plug, ensuring it is gapped correctly (typically 0.044 inches for Honda).
• Torque the spark plug to the manufacturer's specifications (usually around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, multimeter
• Remove the ignition coil from cylinder 1 by unscrewing the mounting bolts.
• Test the ignition coil with a multimeter to check for proper resistance (consult service manual for specific values).
• If faulty, replace the ignition coil with a new one and reattach.

4. Check Fuel Injector

• Tools Required: Fuel pressure gauge, injector cleaner (if applicable)
• Disconnect the electrical connector from the fuel injector for cylinder 1.
• Use a fuel pressure gauge to measure fuel pressure while cranking the engine.
• If pressure is low, check the fuel filter and pump.
• If the injector is clogged, clean it or replace it.

5. Perform Compression Test

• Tools Required: Compression tester
• Remove the spark plug from cylinder 1 and attach the compression tester.
• Crank the engine and record the compression reading.
• Compare the results to manufacturer specifications. If low, further diagnostics may be required.