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Checking vacuum hose leading to changeover valve for exhaust gas recirculation cooler N345 — AUDI

Checking vacuum hose leading to changeover valve for exhaust gas recirculation cooler N345 on Audi: 10 steps, engines CDBA, CDCA, CNEA, CNFA.

Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.

10 steps 6 engine codes

🧭 Before you start

Fits: platform codes S1, 2H

  • Renewed: leaking vacuum hose, turbocharger

🔧 Engine codes this applies to

CDBACDCACNEACNFACNFBCSHA

📐 25 workshop diagrams for CDBA

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

Checking vacuum hose leading to changeover valve for exhaust gas recirculation cooler N345 — CDBA · diagram 1
Checking vacuum hose leading to changeover valve for exhaust gas recirculation cooler N345 — CDBA · diagram 2
Checking vacuum hose leading to changeover valve for exhaust gas recirculation cooler N345 — CDBA · diagram 3
Checking vacuum hose leading to changeover valve for exhaust gas recirculation cooler N345 — CDBA · diagram 4
Checking vacuum hose leading to changeover valve for exhaust gas recirculation cooler N345 — CDBA · diagram 5
Checking vacuum hose leading to changeover valve for exhaust gas recirculation cooler N345 — CDBA · diagram 6
Checking vacuum hose leading to changeover valve for exhaust gas recirculation cooler N345 — CDBA · diagram 7
Checking vacuum hose leading to changeover valve for exhaust gas recirculation cooler N345 — CDBA · diagram 8
+ 17 more diagrams
🔒 25 workshop diagrams for this job Ask about your Audi CDBA — free or sign up free to see the drawings

📋 Procedure

  1. Pull vacuum hose off at middle connection of exhaust gas flap valve N220.
  2. Connect hand vacuum pumpVAS 6213 to removed vacuum hose and generate a vacuum of 0.6 bar.
  3. Observe pressure gauge of hand vacuum pumpVAS 6213 for approx. 30 seconds.
  4. Pull vacuum hose (arrow) off regulating flap potentiometer G584. Seal opening of vacuum hose with clean bung from engine bung setVAS 6122.
  5. Connect hand vacuum pumpVAS 6213 to pulled-off vacuum reservoir and generate a vacuum of 0.6 bar.
CDBA? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Observe pressure gauge of hand vacuum pumpVAS 6213 for approx. 30 seconds.
  2. Renew leaking vacuum hose.
  3. Connect hand vacuum pumpVAS 6213 to potentiometer for regulating flap G584 and generate a vacuum of 0.6 bar.
  4. Observe pressure gauge of hand vacuum pumpVAS 6213 for approx. 30 seconds.
  5. Replace turbocharger .
Workshop diagrams

Ask TorqFix about your Audi CDBA — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.

Ask about your Audi CDBA — free → or sign up free to see the drawings

Other AUDI procedures

Who makes these pages, and how

TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.

The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.

Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.

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Workshop data on this page last updated 20 Sep 2026.