ME9 / P0089 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
Fuel Pressure Regulator Performance
Fault symptom
Malfunction Indicator Lamp
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage must be between 10 - 18 V. |
| Engine running at least 5 seconds. |
Fault criteria:
| The PWM signal is adjusted more than +/- 25% for more than 5 seconds to achieve requested fuel pressure. |
Diagnostic help
Diagnosis regards:
| Desired fuel pressure is adjusted via the fuel pump's PWM control. During a slow change or aging, the system compensates for such in order to obtain the desired pressure. The diagnostic trouble code is generated if the pump/system capacity worsens, e.g. leakage, clogged fuel pipe and pump fault. |
| This DTC is also set when the fuel in the tank runs out. |
Functions in the diagnostic tool related to the fault:
| (See also description of readings/activations in diagnostic tool) |
