cummins fleetguard,cummins gas engines,cummins new engine,cummins oil cooler,cummins diamond series diesels 6cta 8.3,8.3 liter cummins,8.3 cummins engine for sale,8.3 cummins hp,oil capacity 8.3 cummins,8.3 cummins horsepower,cummins 8.3 specs,8.3 cummins engine,8.3 cummins injection pump,8.3 cummins max hp,8.3 cummins lift pump,

FC4238 Low injection air auxiliary pressure detected in metering pump

(Mixing chamber pressure diagnosis)

Prerequisites for diagnostic operation:

Injection metering phase

· Conditions for fault code trigger:

1. The mixing chamber pressure is lower than the set value

- The FC4238 will be triggered for 20 seconds after the above conditions are met.

The system response forbids leakage.

A post-processing system will empty and then stay in the Error state

- The system will always monitor the error status, and if the fault code trigger condition no longer exists (mixing chamber pressure =330~430Kpa), the system error status will be restored.

FC4238 Diagnosis and elimination procedures

Possible causes of the fault:

- Air supply line resistance or blockage

- The air supply line is damaged

One body air supply pressure is insufficient

- The air path in the metering pump is blocked

-DEF jet pipe leak

-ASOV adhesions are usually closed

-ASOV Internal damage

Fault code not current method:

For the reasonableness check of the sensor, after the above faults are eliminated, the fault code can be changed to non-current after the loading test of the metering pump.

Low DEF pressure detected in FC3574 metering pump

Prerequisites for diagnostic operation:

- Metering pump pre-filling successful

Conditions for fault code triggering:

1. DEF pressure is below the set value of 440Kpa

2. DEF pressure < (reference pressure minus 100Kpa)

- After the above conditions are met, the FC3574 will be triggered for 20 seconds.