RPM-SENSE-LOSS
Briggs & Stratton · PowerProtect DX 26kW Standby Generator with Symphony II Controller
The controller lost the engine speed signal from the RPM pickup sensor. Without this signal, the controller cannot regulate engine speed or synchronize the electrical output. The RPM sensor is a magnetic pickup mounted near the engine flywheel or crankshaft that generates pulses as the engine rotates. Check the RPM sensor wiring for damage, chafing, or loose connections at the controller. Verify the sensor gap (clearance between the sensor and the flywheel magnets). A corroded or failed sensor will need replacement. This fault prevents the generator from running until resolved.
Error RPM-SENSE-LOSS on the Briggs & Stratton PowerProtect DX 26kW Standby Generator with Symphony II Controller means: RPM Sense Loss — Speed Signal Lost. The top-ranked community fix is “Test and Replace Faulty RPM Pickup Sensor” (hard difficulty, ~60 min, DIY cost: $15-$25). 2 community-ranked fixes available below.
Published February 2026 · 2 fixes · standby generator
Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.
While many standby generator repairs can be done safely at home, consider hiring a qualified technician if:
Average professional repair cost for this issue: $150-$250.
Charger Fault — Battery Charger Malfunction
Controller Fault — Internal Logic Error
High Temperature — Engine Overheating
Maintenance Due — Service Reminder
Low Battery — Starter Battery Voltage Low
Low Oil Pressure — Engine Protection Shutdown
Weekly Exercise Failure
Fuel System Problems
The Briggs & Stratton PowerProtect DX 26kW Standby Generator with Symphony II Controller has 8 other known error codes:
Error code RPM-SENSE-LOSS also appears on 2 other Briggs & Stratton models:
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