A4 Sedan L4-2.0L Turbo (BPG) (2005)
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Camshaft: All Technical Service Bulletins
Engine - MIL ON/DTC's P2293/P0087/P1093 Set
15 08 05
2013147/7
June 2, 2008. Supersedes Technical Service Bulletin Group 15 number 08-01 dated February 5, 2008 to add Step 5.
MIL on (DTC P2293, P0087 in ECM)
Vehicle Information
Condition
MIL on. The following DTC is stored in the ECM data memory:
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P2293 (Fuel pressure regulator 2 performance)
at times in combination with:
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P0087 (Rail fuel pressure too low)
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P1093 (Fuel trim 2, bank 1 malfunction)
Technical Background
Excessive wear of the cam lobe (in the intake camshaft) that drives the high pressure fuel pump. This limits the maximum pump piston lift, causing fuel
rail pressure fluctuations. The wear on the cam lobe also leads to wear in the base of the high pressure fuel pump cam follower.
Production Solution
Increased surface hardening of the camshaft lobe for the high pressure fuel pump.
Improved intake camshafts have part number 06F 109 101 B.
Service
1.
Remove the high pressure fuel pump and visually inspect:
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The base surface of the cam follower (Figure 1, Point 6) in contact with the camshaft lobe.
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The tip of the high pressure fuel pump plunger.
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The high pressure fuel pump camshaft lobe.
