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HOMESERVICE MANUALSAUDI2009A6 BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 53 (4.2L V8 5V GENERIC SCAN TOOL, ENGINE CODE(S): BNK)28 IGNITION/GLOW PLUG SYSTEMIGNITION SYSTEM, SERVICINGGENERAL NOTES ON IGNITION SYSTEM
2009 Audi A6 Base

General notes on ignition system

2009 Audi A6 BaseSECTION General notes on ignition system
WARNING: This page is about a different car, the 2006 Audi A6 and 2005 Audi A6. However, it is still accessible from the selected car via links, so may be relevant.
  • For the electric components to work properly, a voltage of at least 12.5 V is required.
  • If the engine only starts briefly and then turns off again after troubleshooting, repair or checking of the components, it may be that the immobilizer is blocking the Engine Control Module (ECM) J623. DTC memory must then be checked and if necessary, the Engine Control Module (ECM) J623 must be adapted. → Engine Control Module (ECM) J623, replacing .
  • It is possible that the Engine Control Module (ECM) J623 will recognize a malfunction and store a DTC during some tests. After completing all tests and repairs, the DTC memory should therefore be checked and erased if necessary.

The following work steps must be performed in the mentioned sequence:

  1. Check DTC memory..
  2. If necessary, erase DTC memory..
  3. If DTC memory was erased, generate readiness code..
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.