Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-290B

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) is stored If the actual pressure (measured pressure from the fuel pressure sensor) pulses too much.
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
- None.

Possible source
- Air in the fuel lines
- Blocked fuel lines
- Damaged fuel pressure sensor
- Damaged fuel pump
- Damaged fuel pump control module.

Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Deterioration in performance
- The engine stops.