Filling/bleeding fuel system: VW Jetta VI / Golf V / Jetta 2.0 TDI (CBAA, CBAB, CBAC, CBBA, …)

🧭 Before you start

Switch on the ignition, connect the tester and run the guided bleeding function so the pumps prime the system. Start the engine, run it at moderate speed for a few minutes, switch off and check for leaks. Clear stored faults, then road test over more than 20 km with a full acceleration, recheck the high-pressure side for leaks and read the fault memory again.

Fits: VW Jetta VI (16, 2010–2018), VW Golf V / Jetta (1K, 2003–2009); platform code AJ5

Don't miss

• Never crank the engine before the guided fill has run; a dry high-pressure pump is damaged beyond repair.
• Use the guided function named 'Bleeding fuel system' or 'Filling/bleeding fuel system', depending on software.
• Residual air can trigger emergency running on the road test; switch off, clear faults and continue.
• Recheck the high-pressure part of the system for leaks after the road test, not just at idle.

Written for this job from the workshop steps below · TorqFix editorial.

🔧 Engine codes this applies to

📐 48 workshop diagrams for CBAA

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. ⚠ Risk of irreparable damage to high-pressure pump if allowed to run dry.The high-pressure pump must first be filled with fuel before the engine is started. The high-pressure pump must not be allowed to run while still empty. — Switch on ignition.
2. Connect vehicle diagnosis tester and perform the guided function "“Bleeding fuel system”" or "“Filling/bleeding fuel system”" depending on software version. [Note: The fuel pumps will now be activated for a total of 3 minutes.]
3. Then start engine.
4. After filling fuel system, leave engine running at moderate speed for a few minutes and then switch off again.
5. Check fuel system for leaks.

6. Interrogate fault memory and erase stored fault if necessary.
7. Then test drive the vehicle over a distance greater than 20 km with at least one full acceleration. Then check high-pressure part of fuel system again for leakage. [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 clear the fault memory. Then continue road test.]
8. Interrogate fault memory again. [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 fault memory. Then continue road test.]
9. Read fault memory.

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