TDI injection and glow plug system (4-cyl. 2.0 ltr. 4-valve common rail) — Filling and bleeding fuel system — AUDI

🧭 Before you start

Fits: Audi A6 C6 (4F, 2004–2011)

Don't miss

• To repeat basic setting, switch ignition off and on once. Then start basic setting again.
• If there is any air left in the fuel system, the engine may switch to the backup mode ('emergency running' mode) during the road test. Switch off the engine and erase the event memory. Then continue the road test.

🔧 Engine codes this applies to

📋 Procedure

1. ⚠ If components of the fuel system between the fuel tank and the high-pressure fuel pump are removed or renewed, the basic setting "“Checking fuel system pressurisation pump”" must be performed to bleed the fuel system.If the supplementary fuel pump, fuel line (between fuel tank and high-pressure fuel pump) or fuel filter is removed or renewed, the basic setting "“Checking fuel system pressurisation pump”" must be performed before the engine is started for the first time. — Connect a .
2. Switch on ignition.
3. Select "“Engine electronics”" in vehicle self-diagnosis.
4. Then select "“Basic setting”".
5. Select "“Checking fuel system pressurisation pump”" from the list.

6. Press "“Start”" button.
7. The fuel pumps start running.
8. The fuel pumps must run for approx. 1 minute to ensure that the fuel system is filled sufficiently with fuel. [Note: To repeat basic setting, switch ignition off and on once. Then start basic setting again.]
9. Start engine after filling fuel system.
10. Run engine at moderate speed for several minutes and then switch off.
11. Check fuel system for leaks.
12. Erase entry in event memory using .
13. Road-test vehicle and accelerate with full throttle at least once.
14. Then inspect high-pressure section again for leaks. [Note: If there is any air left in the fuel system, the engine may switch to the backup mode ('emergency running' mode) during the road test. Switch off the engine and erase the event memory. Then continue the road test.]
15. Interrogate event memory again.

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