Yamaha GP1800 and GP1800R Fault Codes: List

The control unit of the GP1800 and GP1800R knows around 50 messages. M-JET DIAGNOSTIC reads them and explains them in plain text, with symptom and check steps.

The most important codes

• 13 pulser coil, 15 engine temperature, 17 knock sensor, 19 battery voltage
• 23 intake air temperature, 24 camshaft, 29 intake pressure, 63 intake system
• 47 slant switch, 55 steering sensor, 65 exhaust manifold water temperature
• 51 throttle lever closed-position switch, 68 cruise/no-wake switch
• 150 to 154 RPS sensor, 157 to 164 SCU
• 112 to 145 throttle valve drive, 124 to 128 TPS, 131 to 135 APS

Classification

On a sport model, temperatures, knock sensor, intake pressure and throttle valve count most, because they stand out first at full load. The app only shows the codes your control unit knows and, for each code, the check steps. If a message returns straight after clearing, the fault is still active and needs fixing.

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 GP1800R: SCU Fault and SCU Initial Learning
• Yamaha GP1800R: Cruise and No-Wake Switch Not Responding (Code 68)
• 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.