Yanmar 6LY3 series Service Manual page 342

TROUBLESHOOTING
P0234/0 (Over Boost)
DTC
DTC Fault Code
DTC / FMI
1. Key switch ON
2. Boost pressure is above 250 kPa (36 psi)
P0234/0
3. 0.5 seconds
4. PWR REDUCTION, the TURBO BOOST on the TELEFLEX display
Fail Mode
Limited Operation
Fail Release
Limited Operation Release
Remarks
Fault
DTC / FMI
P0234/0
Troubleshooting Procedure
1. Check the wastegate.
2. Replace the boost pressure sensor.
13-52
P0234/0
1. Condition, 2. Fault, 3. Time to Detect, 4. Display
Turbocharger over boost condition.
Maximum engine speed is limited to 1800 rpm.
Yes
When boost pressure is below 200 kPa (29 psi)
Yes
After failure is cleared and also when throttle position is at low idle position
—
1. Turbocharger / wastegate
2. Boost pressure sensor
© 2007 Yanmar Marine International
Troubleshooting by DTC Fault Codes
Over Boost
Probable Cause
6LY3 Service Manual
Check Point
Turbocharger
boost pressure sensor