Overview - Reducing Agent Delivery Module, Vehicles With Engine Codes CTBA And CTBB

WARNING: This page is about a different car, the 2014 Audi A8 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Overview Of Reducing Agent Delivery Module, Vehicles With Engine Codes CTBA And CTBB

Courtesy of AUDI OF AMERICA, LLC

Reducing Agent Tank
- Active Tank
- Removing and installing, refer to REDUCING AGENT ACTIVE TANK, REMOVING AND INSTALLING .
Seal
- Replace
- Install dry
- Must not be twisted on itself
Wiring Harness
Delivery Module
- With
  - Filter
  - Reducing Agent Pump -V437-
  - Reducing Agent Metering System Pressure Sensor -G686-
  - Reducing Agent Reservoir Sensor -G697-
  - Reducing Agent Tank Heater (Heating Circuit 1) -Z102-
- Delivery Module, Removing and Installing, refer to REDUCING AGENT DELIVERY MODULE, REMOVING AND INSTALLING, VEHICLES WITH ENGINE CODES CTBA AND CTBB .
- Do not bend the heat mats when installing them
Bolt
- Self-tapping
- Position the bolt by hand and tighten it until it finds the old threads. Then tighten the bolt to the specification.
- Tightening specification and sequence, refer to Fig 2.
Locking Ring
O-Ring
- Replace
Metering Line
- To Reducing Agent Injector -N474-
- With Reducing Agent Ventilation Line Heater -Z104-
- To disconnect, press release buttons
- Clipped in on fuel tank
  WARNING:
  Danger due to reducing agent leaking out.
  - To prevent large amounts of reducing agent leaking out when opening the metering line, wait for the recirculation process to complete, refer to SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM SAFETY PRECAUTIONS .

Fig 2: Delivery Module - Tightening Specification and Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the screws to 2.4 Nm in the sequence shown.