Troubleshooting steps
Diagnose P0121 using service manual, check related sensors and wiring, repair or replace faulty components
Motorcycle Diagnostic Codes
P0121 – Throttle Position Sensor Circuit Range/Performance Problem
Throttle Position Sensor Circuit Range/Performance Problem
Details
Throttle Position Sensor Circuit Range/Performance Problem detected on Harley-Davidson motorcycle. This diagnostic trouble code indicates a problem that requires attention.
Error typeerror
MeaningThrottle Position Sensor Circuit Range/Performance Problem
Typical causesSensor failure, wiring issue, component malfunction, system fault
SolutionsDiagnose P0121 using service manual, check related sensors and wiring, repair or replace faulty components
Severitymedium
Catalog references
Where this appears
Harley-DavidsonP0121
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What does P0121 mean on Harley-Davidson?
P0121 on Harley-Davidson indicates throttle position sensor circuit range/performance problem. Consult service manual for specific diagnosis procedures.
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