Back to 2019 Audi A6
Help
2019 AUDI A6
3.0L V6 TFSI•AWD•AUTOMATIC•gas•supercharged
7 active safety recalls on this vehicle — view recalls
Founding sponsor spot is openYour name on every procedure for this vehicle, permanently.Sponsor — $99 →
Repairs0Labor495Torque4326Fluid9DTC1145Battery1Maintenance0Recalls7
P3004high severityPowertrain

Turbo/Supercharger Wastegate Actuator Stuck Open

on 2019 Audi A6 3.0L V6 TFSI · AWD

What this code means

The wastegate actuator is stuck in the open position, preventing the turbo from building proper boost pressure.

Symptoms

  • Check Engine Light
  • No boost pressure
  • Significant loss of power
  • Engine feels naturally aspirated
  • Poor acceleration at all speeds

Common causes

  • Wastegate actuator rod seized
  • Actuator diaphragm ruptured
  • Wastegate valve carbon buildup
  • Vacuum line disconnected
  • Actuator linkage broken

Diagnostic steps

  1. Check wastegate actuator vacuum line
  2. Manually operate wastegate actuator rod
  3. Inspect actuator diaphragm for leaks
  4. Check for carbon deposits on wastegate valve
  5. Verify boost pressure with gauge

Repair notes

Replace wastegate actuator. Clean carbon from wastegate valve and housing. Check turbo shaft play.

🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITE
Shop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Other Powertrain codes on this vehicle

🔌 Need this data in your app? It's all in the free API →
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
Stuck on this repair? Take it to The Diag Desk — ask a master tech about this exact car → real human answer within 24h, never AI
Share:XRedditFBWhatsAppThreadsEmail
⚠ STILL BEHIND THE PAYWALL
The 2019 Audi A6 repair data is incomplete because no one has sponsored it yet. For $99, we generate the full step-by-step procedures, then fact-check them with a second AI pass and your expert review. Your name on every procedure, permanently.
The same data would cost $169/mo from Mitchell1 or $30/year from ALLDATAdiy — and you'd be renting access, not freeing it. Sponsor once, free forever.
Sponsor the Audi A6 — $99 →
Building an app?
Free API access to all this data — 10 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with ShopBase — $249/mo, all features included.
Try ShopBase →