Fuel System - Engine Crank/No Start, MIL ON, DTC P0087 Set
20 12 02
November 21, 2012
2031426
Vehicle Information
Condition
High Pressure Fuel Pump Diagnosis
Engine Crank, No Start after Long Periods without Driving. Engine may run rough, and or MIL-ON with DTC P0087-low fuel pressure stored in
ECM Fault Memory.
Technical Background
Completing the GFF high pressure pump function test is essential to diagnose proper pump operation and to avoid unnecessary replacements.
Production Solution
N/A
Service
Guided fault finding provides a function test for the high pressure fuel pump. This test must be performed in order to properly diagnose the high
pressure fuel pump.
Note:
A completed high pressure fuel pump function test is required for reimbursement.
Following completion of the function test:
If the fuel rail pressure is within +/- 1 of 40 bar (480 psi.), DO NOT replace the high pressure fuel pump. Continue to further diagnose the fuel
system.
^ With the engine running, check measure value blocks 106, 140 and 141 to confirm fuel rail pressure reads a minimum of 40 bar (480 psi).
The engine should be switched OFF and the key switched ON to perform the following procedure:
^ Enter vehicle self-diagnosis.
^ Select OBD.
^ Select 01 engine electronics.
^ Select 005 - output diagnostic test mode (DTM).
^ VAS will run diagnostics.
^ When the test starts to check operation of the "fuel pressure regulator 2 control circuit high" (figure 1), listen for an audible "click" sound
coming from the N276 pressure regulator.
2019 Volkswagen Jetta GLI(1K2) L4-2.0L Turbo (CCTA) Volkswagen JETTA Page 2
Tip:
The audible "click" sound may be better heard with hood open and the engine cover removed.
^ If "click" noise is heard, DO NOT replace the high pressure fuel pump, this bulletin will not apply. Continue to further diagnose the fuel system.
^ If "click" noise is not heard, replace the high pressure fuel pump.
^ Following completion of the test procedure, the vehicle should be driven with higher RPMs (3000 - 5500) to confirm the fault does not return.
2019 Volkswagen Jetta GLI(1K2) L4-2.0L Turbo (CCTA) Volkswagen JETTA Page 3
Warranty
2019 Volkswagen Jetta GLI(1K2) L4-2.0L Turbo (CCTA) Volkswagen JETTA Page 4
Required Parts and Tools
Additional Information
All part and service references provided in this Technical Bulletin are subject to change and/or removal.
Always check with your Parts Dept. and Repair Manuals for the latest information.
