Yamaha VXR: Knock Sensor Fault (Code 17)

Code 17 reports an irregular signal from the knock sensor on the VXR. It can be a wiring problem or real knock. M-JET DIAGNOSTIC helps you tell them apart.

What you look at

• Fault memory: is code 17 active or only stored?
• Ignition timing in the live data curve under load
• Intake air temperature (code 23) and engine temperature (code 15)
• Connector and wire of the knock sensor

Sensor fault or knock?

If ignition timing is noticeably retarded under load, the control unit really detects knock. Then fuel quality, temperatures and intake are the candidates. If ignition timing stays stable and the message comes anyway, it is mostly a wire or connector problem. If real knock is suspected, do not ride on but have the engine checked.

Related topics

• Yamaha VXR: Power Fading, Check Intake Pressure and Throttle
• Buying a Used Yamaha VXR and VXS: Was It a Rental?
• Yamaha WaveRunner Knock Sensor Fault
• 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.