Diagnostic Trouble Code (DTC) Information ECM-P019126

Condition 

Fig 1: Identifying Fuel Pressure Sensor

Courtesy of VOLVO CARS CORPORATION

The engine control module (ECM) checks the signal from the fuel pressure sensor.

The diagnostic trouble code (DTC) is stored if the control module registers that the signal from the fuel pressure sensor does not change when the fuel pump (FP) activation changes.

The diagnostic trouble code (DTC) can be diagnosed under specific driving conditions.

Substitute Value 

• The fuel pressure is set to a constant.
• The control signal to the fuel pump (FP) control module is set to a calculated value.

Possible Source 

• Contact resistance in the connectors.
• Damaged fuel pressure sensor.
• Damaged fuel pump module.

Fault symptom[s] 

• Malfunction indicator light (MIL), on
• Engine misfires.
• Jerky operation.
• Engine stops.