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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 4679
Experience:  Owner at DJ Wilson
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I have a 2008 fuso FS420 and I'm having problems with the

Customer Question

Hi I have a 2008 fuso FS420 and I'm having problems with the engine dying intermittently. The red check light comes on and I'm getting flash codes 11 and 63
Submitted: 10 months ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 10 months ago.

Hi My name is***** with me while I look up these codes.

Expert:  Daniel Wilson replied 10 months ago.

What is your complete engine model number from the ID tag?

Customer: replied 10 months ago.
Engine No: 6M70-411277
Expert:  Daniel Wilson replied 10 months ago.

Code 63 is the equivalent of the faults listed below for rail pressure. Either actual low rail pressure or a sensor/harness problem.

P1251 Common Rail Pressure M/V 1 63

P1255 Common Rail Pressure M/V 1 63

P1256 Common Rail Pressure M/V 1 63

Expert:  Daniel Wilson replied 10 months ago.

P0192 Common Rail Pressure Sensor 11

P0193 Common Rail Pressure Sensor 11

Since this sensor codes is present I would check the sensor harness for problems and if okay replace the sensor and then verify if there is actual low fuel pressure. Let me Know.

Expert:  Daniel Wilson replied 10 months ago.

Fault P0192

Generation condition Common rail pressure sensor voltage is below standard value (0.2 V).Recoverability System recovers (power is re-supplied to electronic control unit) if signal becomes normal when starter switch is turned OFF

ON.Control effected by electronic control unit

Common rail pressure open loop control is effected. (Output is reduced, and exhaust emissions worsen.)

Exhaust gas recirculation control and throttle control are stopped.Inspection Service data0C: Difference Common Rail Pressure Electrical equipment#319: Common rail pressure sensor Electric circuit diagram Common rail pressure sensor system

Fault P0193

Generation condition Common rail pressure sensor voltage is below standard value (4.8 V).Recoverability System recovers (power is re-supplied to electronic control unit) if signal becomes normal when starter switch is turned OFF

ON.Control effected by electronic control unit

Common rail pressure open loop control is effected. (Output is reduced, and exhaust emissions worsen.)

Exhaust gas recirculation control and throttle control are stopped.Inspection Service data0C: Difference Common Rail Pressure Electrical equipment#319: Common rail pressure sensor Electric circuit diagram Common rail pressure sensor system

Expert:  Daniel Wilson replied 10 months ago.

P1251

Generation condition Current flowing to MPROP (injection quantity adjustment valve) is above standard value.Recoverability System recovers (power is re-supplied to electronic control unit) if signal becomes normal when starter switch is turned OFF

ON. Control effected by electronic control unit

Injection quantity is limited. (Output is reduced, fuel economy worsens, and exhaust emissions worsen.)

Exhaust gas recirculation control and throttle control are stopped.Inspection Actuator testB9: Fuel Leak Check Electronic control unit connector: MPROP (injection quantity adjustment valve)Electrical equipment#574: MPROP (injection quantity adjustment valve)Electric circuit diagram MPROP (injection quantity adjustment valve) system

P1255

Generation condition MPROP (injection quantity adjustment valve) voltage is below standard value.Recoverability System recovers (power is re-supplied to electronic control unit) if signal becomes normal when starter switch is turned OFF

ON. Control effected by electronic control unit

Injection quantity is limited. (Output is reduced, fuel economy worsens, and exhaust emissions worsen.)

Exhaust gas recirculation control and throttle control are stopped.Inspection Actuator testB9: Fuel Leak Check Electronic control unit connector: MPROP (injection quantity adjustment valve)Electrical equipment#574: MPROP (injection quantity adjustment valve)Electric circuit diagram MPROP (injection quantity adjustment valve) system

P1256

Generation condition MPROP (injection quantity adjustment valve) voltage is above standard value.Recoverability High voltage:System recovers if signal becomes normal with starter switch in ON position.Short circuit:System recovers (power is re-supplied to electronic control unit) if signal becomes normal when starter switch is turned OFF

ON.Control effected by electronic control unit

Injection quantity is limited. (Output is reduced, fuel economy worsens, and exhaust emissions worsen.)

Exhaust gas recirculation control and intake throttle control are stopped.Inspection Actuator testB9: Fuel Leak Check Electronic control unit connector: MPROP (injection quantity adjustment valve)Electrical equipment#574: MPROP (injection quantity adjustment valve)Electric circuit diagram MPROP (injection quantity adjustment valve) system

Expert:  Daniel Wilson replied 10 months ago.

I have a full service book for 2005 with detailed repair and test procedures and schematics that will be helpful if you are interested I will post the link.

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