Diagnostic Trouble Code (DTC) Information

ECM-P008900 Fuel Pressure Regulator Performance


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). For information about fuel pressure regulation, see Design and Function.

The diagnostic trouble code (DTC) (measured pressure from the fuel pressure sensor) is stored if the actual pressure varies/pulses too much.

The diagnostic trouble code (DTC) can be diagnosed when the engine is running.

Substitute Value
- The fuel pump (FP) is controlled using a calculated value.

Possible Source
- Air in the fuel lines.
- Blocked fuel lines.
- Damaged fuel pressure sensor.
- Damaged fuel pump.
- Damaged fuel pump (FP) control module.

Fault Symptom[s]
- Malfunction indicator lamp (MIL) lit.
- Poor performance.
- Engine stops.