Diagnostic trouble code (DTC) information ECM-211A

Condition

Fig 1: Identifying Fuel Pump (FP) Control Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

The engine control module (ECM) controls the fuel pressure via the fuel pump control module using a PWM signal. The fuel pump 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 VIDA Design and Function.

Diagnostic trouble code (DTC) ECM-211A, 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.

Diagnostic trouble code (DTC) ECM-211A, 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. Diagnostic trouble code (DTC) ECM-211A, 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:

Defective fuel pressure sensor
Defective fuel pump control module.

Signal too low:

Leakage at the fuel lines
Defective fuel pressure sensor
Defective fuel pump (FP)
Defective fuel pump control module.

Signal missing:

Air in the fuel lines
Blocked fuel lines
Defective fuel pressure sensor
Defective fuel pump (FP)
Defective fuel pump control module.

Faulty signal:

Leakage in the fuel lines
Defective fuel pressure sensor
Defective fuel pump (FP)
Defective fuel pump control module.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit
Deterioration in performance
The engine stops.