Yamaha FX1000(A) and FX1100 Fault Codes: List

The FX1000(A) and the FX1100 of 2003 to 2008 use a control unit with a few more messages than the very first FX. M-JET DIAGNOSTIC reads them and classifies them for you.

The codes of these control units

• 19 pulser coil, 21 engine temperature, 24 throttle position sensor, 25 battery voltage
• 35 intake air temperature, 36 camshaft sensor, 41 air pressure sensor
• 71 slant switch
• 84 bypass valve motor, 85 steering switch
• 99 intake system (irregular intake air), 104 no-wake switch

Not every code occurs on every craft

Which messages exist depends on equipment and model year. The app only shows the entries your control unit knows, with symptom and check steps for each code. Code 99 indicates irregular intake air; typical causes are a slipped intake hose or false air. For faults on the bypass valve motor, idle learning after the repair is worthwhile.

Note on numbering: the codes come from the control units' diagnostic database, as the diagnostic tool reads them. Forums and manuals partly circulate different assignments, especially for older models and for codes shown on the display. When in doubt, the description in the app counts.

Related topics

• Yamaha FX1100: Idle Hunts or Engine Stalls
• Yamaha FX1100: No-Wake Mode and Steering Switch Report Faults
• Reading Yamaha WaveRunner Fault Codes
• Diagnostics and fault codes for your Yamaha model
• All Yamaha WaveRunner diagnostics topics

Everything runs via app over Bluetooth, for Yamaha WaveRunners from model year 2002 to today. Learn more about the M-JET DIAGNOSTIC for Yamaha WaveRunner.