Overview - Reducing Agent Delivery Line, Vehicles With Engine Codes CTBA And CTBC

WARNING: This page is about a different car, the 2016 Audi Q5, 2015 Audi Q5, and 2014 Audi Q5. However, it is still accessible from the selected car via links, so may be relevant.

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

Courtesy of AUDI OF AMERICA, LLC

Particulate Filter
Reducing Agent Injector -N474-
- Removing and installing, refer to Reducing Agent Injector -N474-, REMOVING AND INSTALLING, VEHICLES WITH ENGINE CODES CTBA AND CTBC .
- The tabs in the Reducing Agent Injector -N474- must be inserted in the appropriate mounts in the front exhaust pipe.
O-Ring
- Replace
Metering Line
- From the Reducing Agent Pump -V437-
- with heating
- 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 from leaking out when opening the metering line, wait for the recirculation process to complete SCR SYSTEM SAFETY PRECAUTIONS => Reducing Agent, Automatic Regeneration .
Coolant Hoses
Seal
- Replace
Clamp
- Replace
Bolt
- Tightening specification: 5 Nm