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
P3009low severityPowertrain

Turbo/Supercharger Intercooler Temperature Sensor Circuit

on 2019 Audi A6 3.0L V6 TFSI · AWD

What this code means

The charge air cooler (intercooler) temperature sensor is reporting values outside the expected range. The PCM uses this data to optimize boost and timing.

Symptoms

  • Check Engine Light
  • Reduced power in hot conditions
  • Excessive timing retard
  • Poor performance on hot days
  • Inconsistent boost levels

Common causes

  • Faulty intercooler temperature sensor
  • Corroded sensor connector
  • Damaged wiring
  • Clogged intercooler fins
  • Intercooler leak reducing cooling

Diagnostic steps

  1. Read intercooler temp PID and compare to ambient
  2. Test sensor resistance vs temperature chart
  3. Inspect sensor connector for corrosion
  4. Check intercooler for external blockage
  5. Pressure test intercooler for leaks

Repair notes

Replace intercooler temperature sensor. Clean intercooler fins if clogged. Repair any intercooler leaks found.

🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
As an Amazon Associate, 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 →