Controller shows E19 and logs a sensor error; generator may not start.

Safety first: Turn the generator OFF and disconnect the battery negative cable. Allow moving parts to stop completely.

• Locate RPM sensor: The sensor is typically mounted near the flywheel or crankshaft. Refer to the Ryobi service manual for exact location.
• Inspect sensor and wiring: Check that the sensor is firmly mounted and its connector is secure. Inspect the harness for chafing or cuts.
• Clean sensor tip: If it is a magnetic pickup, remove the sensor and wipe off any metal shavings or debris from the tip. Reinstall to the specified gap using a feeler gauge.
• Replace sensor if needed: If visual inspection and cleaning do not resolve the issue, replace the RPM sensor with a Ryobi‑approved part.
• Clear code and test: Reconnect the battery, clear E19, and start the generator. If the code returns, the controller input circuit may be faulty and should be checked by a technician.