Diagnostic Trouble Code (DTC) Information ECM-211A
Condition
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) (Faulty signal) is stored if the control capacity of the engine control module (ECM) for fuel pressure reaches the highest or lowest value and the desired fuel pressure (target value) is not achieved.
The diagnostic trouble code (DTC) (Signal too high/low) is stored if the actual pressure (gauged pressure from the fuel pressure sensor) becomes too high/low compared with the requested pressure (engine control module (ECM) target value) for a certain amount of time.
The diagnostic trouble code (DTC) (Signal missing) is stored if the actual pressure pulses too much.
The diagnostic trouble code (DTC) can be diagnosed when the engine is running.
Substitute Value
None.
Possible Source
Signal too high:
- Damaged fuel pressure sensor
- Damaged fuel pump (FP) control module.
Signal too low:
- Leakage at the fuel lines
- Damaged fuel pressure sensor
- Damaged fuel pump
- Damaged fuel pump (FP) control module.
Signal missing:
- Air in the fuel lines
- Blocked fuel lines
- Damaged fuel pressure sensor
- Damaged fuel pump
- Damaged fuel pump (FP) control module.
Faulty signal:
- Leakage in the fuel lines
- Damaged fuel pressure sensor
- Damaged fuel pump
- Damaged fuel pump (FP) control module.
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Deterioration in performance
- The engine stops.