Fuel System - Unnecessary HP Fuel Pump Replacement Quick Info 2 55/11 ENU 2463 July 8, 2011

Technical Service Bulletin # 255/11 Date: 110708
Fuel System - Unnecessary HP Fuel Pump Replacement
Quick Info 2
55/11 ENU 2463
July 8, 2011
The present document was valid at the time of print. A later version may be available online
Unnecessary Replacement of High-Pressure Fuel Pump (55/11)
Model year: as of 2009 up to 2011
Information
^ Document with limited validity
This Quick Information is valid until December 31, 2011
Vehicle Type:
Boxster/Cayman (987) model line
Carrera (997) model line
Cayenne (92A) model line
Panamera (970) model line
Concerns:
High-pressure fuel pump
Information:
We have discovered that the high-pressure pump is increasingly being replaced, but in subsequent tests carried out by the manufacturer, these
high-pressure pumps are found to be functioning correctly.
Due to various customer complaints, such as
^ engine start problems
^ reduced engine power
and the following fault memory entries in the DME control unit
^ P0190 - Fuel high-pressure sensor
^ P1030 - Fuel high-pressure sensor stuck
the high-pressure pump is being replaced (complaints can vary and problems can occur independently of each other).
In most cases, the sensor of the high-pressure pump is defective and is the cause of these complaints.
Action Required:
Diagnose the faults and work through the fault codes using "Guided Fault Finding" in PIWIS Tester II.
Model year as of 2009, Model year up to 2011
C02, C36