Troubleshooting
50940411/G0219 176 Printed in U.S.A.
2950 4 P1659 Intake Throttle Drive Circuit
GND short-circuit of throttle valve drive H bridge
output 1
2950 5 P0660 Intake Throttle Drive Circuit No-load of throttle valve drive H bridge circuit
2950 6 P1660 Intake Throttle Drive Circuit
Overload on the drive H bridge circuit of the throttle
valve
2951 3 P1661 Intake Throttle Drive Circuit
VB power short-circuit of throttle valve drive H
bridge output 2
2951 4 P1662 Intake Throttle Drive Circuit
GND short-circuit of throttle valve drive H bridge
output 2
3059 5 P053A Poor Intake Heater Connection Intake heater error
3242 0 P1436 DPF Inlet Temperature Sensor
DPF inlet temperature sensor temperature
abnormally high
3242 3 P1428 DPF Inlet Temperature Sensor DPF inlet temperature sensor fault (high voltage)
3242 4 P1427 DPF Inlet Temperature Sensor DPF inlet temperature sensor fault (low voltage)
3242 10 P167E DPF Inlet Temp. Sensor Malfunction After-treatment error
3250 0 P1426
DPF Intermediate Temperature
Sensor
DPF intermediate temperature sensor temperature
abnormally high (post-injection failure)
3250 1 P0420
DPF Intermediate Temperature
Sensor
DPF intermediate temperature sensor temperature
abnormally low
3250 3 P1434
DPF Intermediate Temperature
Sensor
DPF intermediate temperature sensor fault (high
voltage)
3250 4 P1435
DPF Intermediate Temperature
Sensor
DPF intermediate temperature sensor fault (low
voltage)
3250 10 P167A
DPF Intermediate Temp Sensor
Malfunction
After-treatment error
3251 0 P2452 DPF Differential Pressure Sensor
DPF differential pressure sensor differential
pressure abnormally high
3251 3 P2455 DPF Differential Pressure Sensor DPF differential pressure sensor fault (high voltage)
3251 4 P2454 DPF Differential Pressure Sensor DPF differential pressure sensor fault (low voltage)
3251 13 P2453 DPF Differential Pressure Sensor Abnormal learning value
3609 3 P1455 DPF High Pressure Sensor DPF high pressure side sensor fault (high voltage)
3609 4 P1454 DPF High Pressure Sensor DPF high pressure side sensor fault (low voltage)
3609 10 P167C DPF High Pres. Sensor Malfunction After-treatment error
3719 0 P1424 DPF OP Interface Backup mode
3719 7 P1446 DPF OP Interface Recovery regeneration prohibition
3719 9 P1445 DPF OP Interface Recovery regeneration failure
3719 16 P1421 DPF OP Interface Stationary regeneration standby
3720 0 P1420 DPF OP Interface Ash cleaning request 2
3720 16 P242F DPF OP Interface Ash cleaning request 1
4257 12 P0611 Injector (Common) Injector drive IC error
4795 31 P226D DPF Substrate Removed After-treatment error
37251 16 P1437 DPF
Maintenance (maintenance not performed for a
given period of time)
522241 2 P1224 Engine Fuel Rack Actuator Relay Intermittent fault
Table 55: Yanmar Engine Diagnostic Trouble Codes (DTC)
DTC Error Item
SPN FMI P-Code Part State