Diagnostic trouble code (DTC) information ECM-281C
Condition
If the diagnostic trouble code is generated, it is an indication that the fuel pressure has exceeded 800 kPa, there is a risk of fuel leakage.
The engine control module (ECM) controls the fuel pressure via the fuel pump (FP) control module using a pulse width modulation (PWM) signal. The fuel pump (FP) control module then controls the fuel pump (FP) depending on the pressure requested by the engine control module (ECM). The diagnostic trouble code (DTC) is stored if the actual pressure (measured pressure from the fuel pressure sensor) rises too high in comparison with the requested pressure (target pressure) during a certain time frame.
The diagnostic trouble code (DTC) can be diagnosed when the engine is idling.
For information about fuel pressure regulation, see VIDA Design and Function.
Substitute Value
- Predefined value used.
Possible Source
- Damaged fuel pump control module.
- Damaged fuel pump unit.
- The cable for voltage supply to the fuel pump is short-circuited to supply voltage.
- Damaged fuel pressure sensor
Fault symptom[s]
- Message in information display
- Malfunction indicator lamp (MIL) lit
- Deterioration in performance
- The engine stops.