how to fix P0301 code in Ford Explorer Fifth Generation (2011-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to prevent electrical shorts.
• Allow the engine to cool down before proceeding.

2. Inspect and Replace Spark Plugs

• Remove the engine cover (if necessary) to access the spark plugs.
• Use a socket wrench to remove the spark plug from cylinder 1.
• Inspect the spark plug for signs of wear, carbon buildup, or damage.
• If necessary, replace the spark plug with a new one, ensuring it is gapped correctly (0.054 inches for Ford Explorer).
• Reinstall the spark plug and torque it to the manufacturer's specification (typically 13-15 lb-ft).

3. Check and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil on cylinder 1.
• Remove the mounting bolt securing the ignition coil.
• Take out the ignition coil and inspect it for cracks or damage.
• Replace with a new ignition coil if defective.
• Reinstall the ignition coil and reconnect the electrical connector.

4. Inspect Fuel Injector

• Locate the fuel injector for cylinder 1.
• Disconnect the electrical connector and fuel line (ensure you relieve fuel pressure before doing this).
• Remove the fuel injector and inspect for clogs or damage.
• Clean the injector using a cleaning kit, or replace it with a new one if necessary.
• Reinstall the fuel injector, reconnect the fuel line, and the electrical connector.

5. Perform Compression Test

• Remove the spark plug from cylinder 1 and install a compression gauge.
• Crank the engine and note the reading; it should be within the manufacturer's specified range (around 150-200 psi).
• If the compression is low, further diagnosis may be required to check for valve or piston issues.

6. Final Reassembly

• Reinstall any components removed during the inspection.
• Reconnect the negative battery terminal.
• Clear the P0301 code using an OBD-II scanner.