Removing and installing catalytic converter - vehicles with hybrid drive — AUDI

🧭 Before you start

Fits: Audi A6/A7 C7 (4G, 2011–2018); platform code 4X

• Renewed: seals

Don't miss

• Renew seals, gaskets and self-locking nuts.

🔧 Engine codes this applies to

📋 Procedure

1. ⚠ High voltage can cause fatal injury.Danger of severe or fatal injuries from electric shock. The high-voltage system may only be de-energised by a suitably qualified person (Audi high-voltage technician). It must be definitely confirmed that the high-voltage system is de-energised. The system may only be de-energised using the vehicle diagnostic tester via "“Guided Fault Finding”". The qualified person (Audi high-voltage technician) confirms that the system is de-energised and uses the locking cap T40262 to ensure that the system cannot be re-energised. The ignition key and the maintenance connector for high-voltage system TW are then stored in a safe place by the qualified person.The qualified person (Audi high-voltage technician) marks the vehicle by attaching the appropriate warning signs. — Remove plenum chamber partition panel General body repairs, exterior50Bulkhead; Exploded view - plenum chamber partition panel.
2. Unplug connector (A) for high-voltage wiring harness for drive motorPX2 and connector (B) at drive motor rotor position sender 1G713 on top left of gearbox.
3. Unplug electrical connector (C) for Lambda probe after catalytic converter G130 and detach from cable tie (arrow).
4. Lift retaining clips (1, 4), release hose clip (3) and detach coolant hoses.
5. Unplug electrical connectors (2) and move wiring clear.

6. Release hose clips (1) and detach coolant hoses.
7. Unscrew bolts (arrows) and remove pump unit.
8. Remove air cleaner housing .
9. Remove front silencer .
10. Remove nuts (arrows) and lift out catalytic converter. [Note: Renew seals, gaskets and self-locking nuts.]
11. Install front silencer .
12. Install air cleaner housing . [Note: Re-energising high-voltage system:Connect vehicle diagnostic testerSelect Guided Fault Finding modeUsing the Go To button, select the following menu options in succession:Selecting function/componentBodyElectrical systemSelf-diagnosis compatible systems8C - Hybrid battery management -J8408C - Hybrid battery management, functions51 - Re-energise high-voltage system (Rep. gr. 93)]

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