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Home >> Volkswagen >> 2018 >> Beetle S, 2D Hatchback >> Repair and Diagnosis >> External Pages >> Different car >> Section 63 (2.5L - Exhaust System, Emission Controls - Engine Code(S): CBTA & CBUA (Convertible)) >> 26 Exhaust System, Emission Controls >> Description And Operation >> Secondary Air Injection System Overview

Secondary Air Injection System Overview

WARNING: This page is about a different car, the 2014 Volkswagen Beetle and 2013 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

Vehicles with engine code CBTA and CCCA do not have a secondary air injection system.

Air is blown briefly into the exhaust valves by the Secondary Air Injection (AIR) system during a cold start. This produces an oxygen rich exhaust gas, causes after burning and reduces the heating-up phase of the catalytic converter.

Fig 1: Identifying Secondary Air Injection System Components
GWWN26-10375Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
  1. Bolt
    • 10 Nm
  2. Connecting Pipe
    • Follow the tightening sequence, refer to Fig 2.
    • On with engine code CBUA
  3. Connector
    • For Secondary Air Injection (AIR) Solenoid Valve -N112-
  4. Secondary Air Injection Solenoid Valve -N112-
  5. Pressure Pipe
    • Make sure it is secure
    • To disengage, squeeze together securing ring
  6. Secondary Air Injection Sensor 1 -G609-
  7. Bolts
    • 2 Nm
  8. Bracket
  9. Seal
  10. Bolt
    • 10 Nm
  11. Intake Manifold
    • For secondary air injection pump
  12. Secondary Air Injection Pump Motor -V101-
  13. Rubber Bushing
  14. Bolt
    • 25 Nm
  15. Nut
    • 10 Nm
  16. Intake Manifold Support
  17. Cylinder Head
  18. Intake Hose
Fig 2: Identifying Connecting Tube Tightening Sequence
GWWM26-0181Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Replace all connecting pipe seals -A-.

-- Screw in all bolts only hand-tight.

-- First tighten the bolts -1-, then the bolt -2- and finally the bolts -3- to 10 Nm.