Yamaha FZR and FZS: Check the Intake Pressure Sensor (Code 29)

With supercharging, intake pressure is a key value. Code 29 reports an intake pressure sensor out of specification. M-JET DIAGNOSTIC helps you classify the message.

How to check the sensor

• Ignition on, engine off: intake pressure should roughly equal atmospheric pressure
• Compare intake pressure and atmospheric pressure in the live data
• At idle: a calm, stable value
• Check connector, wire and hose to the sensor

What a deviation means

If atmospheric and intake pressure do not match at standstill, the sensor or its connection is suspect. A value that flutters at idle points to false air or a poor contact. Because the control unit uses the boost pressure for injection quantity and ignition, a fault affects power directly. Check the simple things first.

Related topics

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• Yamaha FZR and FZS: Season Start Check via App
• 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.