Engine/Fuel - MIL ON/DTC's DTC P0087/P1093/P2293
15 09 02November 10, 2009
2015153 Supersedes T.B. Group 15 number 09-01 dated March 12, 2009 to include an oil and oil filter change in the procedure and update vendor code.
Vehicle Information
Condition
MIL ON, DTC P0087, P1093 or P2293 Stored in ECM Fault Memory
MIL ON with the following DTCs may be stored in ECM fault memory:
Technical Background
Excessive wear of intake camshaft lobe that drives the high pressure fuel pump. The wear limits maximum pump piston lift, causing fuel rail pressure fluctuations.
The wear on the camshaft lobe can also lead to wear on the base of the high pressure fuel pump cam follower.
Note:
Please review with customer the importance of using proper engine oil. Use of engine oil that does not meet VW quality standards can cause premature wear to engine components. Refer to Technical Bulletin Instance 2012855 Engine Oils Which Meet Volkswagen Oil Quality Standards VW 502 00, VW 505 01 and VW 504 00/507 00.
Production Solution
Increase surface hardening of camshaft lobe for the high pressure fuel pump. Improved intake camshafts have Part No. 06F109101B.
Service
If there are low pressure faults stored in the ECM like P310b or P129f, always diagnose low pressure faults first before diagnosing high pressure faults.
Note:
DO NOT REPLACE high pressure pump for low pressure faults.
Remove the high pressure fuel pump and visually inspect:
1. Base surface of the cam follower -6- in contact with the camshaft lobe.
2. Tip of the high pressure fuel pump plunger.
3. High pressure fuel pump camshaft lobe.
If the base of the cam shaft follower looks like -C- or -D-, no excessive wear is present.
Cam follower and camshaft should NOT be replaced.
Tip:
If excessive wear of the cam follower is found an oil change should be performed on the vehicle following the repair.
If the cam follower base surface is excessively worn so that its surface is concave -B- or missing -A-, inspect the intake cam shaft lobe for wear.
If the high pressure fuel pump camshaft lobe shows excessive wear, replace the intake camshaft with Part No. 06F109101B and the cam follower with Part No. 06D109309C, see Group 15 Engine - Cylinder head, Valvetrain in ElsaWeb.
Tip:
Tool T10252 may not properly lock intake cam into position. Because of cam position, valve spring tension could cause cam to rotate clockwise (front of engine view). This will cause misalignment of sprocket teeth and chain. If this happens, rotate counterclockwise (front of engine view) until chain and sprocket teeth align; slack must be at top of drive. Rotating clockwise will cause timing to be off.
Inspect the tip of the high pressure fuel pump plunger for excessive wear.
Note:
If plunger tip of fuel pump is NOT WORN, DO NOT REPLACE the fuel pump.
If excessive wear is found the high pressure pump must also be replaced, see Group 20 Fuel Supply in ElsaWeb.
Tip:
High pressure fuel pump plunger damage is only possible if the cam follower base has a hole in it and the plunger tip has come in direct contact with the camshaft lobe.
If no excessive wear can be found in the high pressure fuel pump cam follower or intake camshaft lobe, or if the damage is found in camshafts with part number 06F109101B, create a Technical Assistance Contact Ticket
under the Concern Type Engine and Engine Electronics in ElsaWeb.
If excessive wear of the cam follower is found an oil change should be performed on the vehicle following the repair.
Attach the complete diagnostic log to the contact, and call the VW Technical Assistance Center for further assistance.
Warranty
Required Parts and Tools
No Special Tools required.
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.