Generator cranks but does not start, then stops and displays E02 on the Ryobi controller.

Safety first: Place the generator in OFF mode. Disconnect the battery negative cable. Do not smoke or create sparks near fuel components.

• Verify fuel supply: Check the main fuel source (natural gas or LP tank). Ensure the gas shutoff valve feeding the Ryobi standby generator is fully open. For LP, confirm the tank is not empty and the regulator is not iced or damaged.
• Inspect fuel line and regulator: Follow the gas line to the generator's gas inlet. Make sure flexible hoses are not kinked or crushed. Listen and smell for gas leaks; if you suspect a leak, shut off gas immediately and call a professional.
• Check carburetor fuel solenoid: Remove the access panel and locate the fuel shutoff solenoid on the carburetor bowl. Inspect the wiring connector for corrosion or loose pins. Reseat the connector. If you have a helper, reconnect the battery, command a start, and listen/feel for a click at the solenoid when the controller calls for fuel. No click may indicate a failed solenoid or wiring issue.
• Inspect spark plug and ignition: Remove the spark plug boot and plug. Check for heavy carbon, oil fouling, or a cracked insulator. Clean or replace the plug with the exact type specified by Ryobi. Ensure the ignition coil lead is firmly attached and not damaged.
• Clear code and retest: Reconnect the battery, clear E02 if possible, and attempt a manual start. If the unit still overcranks without firing, further diagnosis of fuel pressure, carburetor, and ignition timing should be done by a qualified technician.