We are thrilled to introduce this technical bulletin dedicated to the VOLVO , Model S80 II , Version 1.6 D Drive (D 4164 T) 80 KW 109 HP 1560 Cm3.

Our aim with this bulletin is to offer comprehensive procedures and concise instructions, providing invaluable support for your maintenance and troubleshooting endeavors.

SYMPTOMS:

P1586 – Rail sensor, flow meter, EGR valve copy sensor. Voltage too low.

-Fault code recorded in the engine control unit.

-Engine warning light (MIL) ON. The engine jerks.

-The engine stops occasionally. Difficulty when starting the engine. Power loss.

POSSIBLE CAUSES:

• Defect in any of the sensors that share a power supply.
• Defect in the electrical connectors and wiring of the sensors.
• Defect in the hardware of the engine control unit.

Repair procedure:

• Read the fault codes recorded in the control unit using the diagnostic tool.
• Confirm that the fault code mentioned in the field symptoms of this bulletin is recorded.
• Confirm that one or several of the symptoms mentioned in the field symptoms of this bulletin are reproduced.
• Read the high-pressure fuel rail sensor parameters using the diagnostic tool.
• Check the high-pressure fuel rail sensor wiring and connector if the reading values of the pressure sensor are not correct. Repair the wiring if necessary.
• Replace the high-pressure fuel rail sensor and connector with a modified version if the wiring of the sensor is not damaged.
• Check the other sensors that share an electrical power supply with the rail pressure sensor if the above-mentioned checks are satisfactory. Repair or replace if necessary.
• Check the output voltage of the control unit to the different sensors if the above- mentioned checks are satisfactory. Repair or replace the unit if necessary.

See image 1:

A – Location of the high-pressure fuel rail sensor.

See image 2:

• Wiring diagram of the high-pressure fuel rail sensor.

A – Engine control unit.

B – High-pressure fuel rail sensor.

IMAGE 1 :

IMAGE 2 :

We strongly recommend utilizing Mecainfo‘s TSB (Technical Solutions Bulletin). This invaluable resource contains pre-established remedies for frequently encountered problems, providing a valuable repository of knowledge to support you in your maintenance and troubleshooting endeavors.