Special injectors with hydraulic servo-system and electrical triggering element (solenoid valve) are used with the common rail system in order to achieve efficient start of injection and precise injected fuel quantity.
Metering and spray preparation of the diesel fuel, as needed by the engine according to the engine map, Realization of pilot and main injection and post injection if required. Pilot injection is used to reduce the engine noise and vibration and post injection is used to reduce the NO and N0X in the exhaust gas.
Control of injected quantity and injection timing based on the system pressure and energizing time as actuated by the ECM
The injected fuel quantity is now defined by the injector opening time and rail pressure. Injection is terminated when the solenoid valve is no longer triggered and closes as a result. In case of more than 2 injectors failure, the engine symptoms will occur the running engine stall and the starting impossible.
If the fuel injector circuit is short or open during two driving cycles, this code will be set. If the circuit is not continuous during two driving cycles, this code will be set and the MIL will be turned on.
DTC NO. | Detecting Condition | Possible Cause |
P 0267 P 0268 P 0269 | Detecting Condition ● P 0267 Overcurrent low side connection (Short circuit) : Injector current increases the maximum value of 29.5 A ~ 34 A ● P 0268 Overcurrent high side connection (Short circuit) : Injector current increases the maximum value of 28 A ~ 36 A ● P 0269 ① Load drop error (Open circuit) load drop is detected if during energizing the minimum current/min = 3A is not reached ② Fast current decrease error (Closing fault) : A fixed time after the energizing period the current has to decrease below/min = 3A ● Engine Condition : RUN ● Fuel Limit : YES ● Fuel Cut : NO ● EGR OFF : NO ● MIL : YES | ● Open or short in circuit ● Injector ● ECM |