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This reference summarizes ignition coil information for 2026 Ford EcoBoost engines, with emphasis on the Focus 2.0L. Ford has published technical service bulletins for misfire and coil-failure conditions; owners should check the latest Ford OASIS service database for the current bulletin number and applicability. The 2.0L EcoBoost uses coil-on-plug ignition coils. When diagnosing P0300-P0304, inspect the coil boots, spark plugs, and connectors. Aftermarket coils should meet applicable SAE performance and electromagnetic compatibility standards, and technicians should verify resistance values for the specific engine code before replacement. Typical coil primary resistance is 0.5-1.0 ohm and secondary resistance may range from 6 kΩ to 15 kΩ, but exact figures can vary by manufacturer and model year. Always follow the vehicle's workshop manual and torque specifications.