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2019 AUDI A6
3.0L V6 TFSI•AWD•AUTOMATIC•gas•supercharged
7 active safety recalls on this vehicle — view recalls
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Repairs0Labor495Torque4326Fluid9DTC1145Battery1Maintenance0Recalls7
P3625moderate severityPowertrain

Dynamic Skip Fire (DSF) Control Module Communication Error

on 2019 Audi A6 3.0L V6 TFSI · AWD

What this code means

The Dynamic Skip Fire control module that selectively fires individual cylinders based on demand has a communication fault with the PCM.

Symptoms

  • Check Engine Light
  • DSF system disabled
  • Constant all-cylinder firing
  • Reduced fuel economy
  • Engine may vibrate more than usual
  • No smooth cylinder deactivation transitions

Common causes

  • CAN bus communication fault
  • DSF module failure
  • PCM DSF driver circuit issue
  • Wiring harness damage
  • Software version mismatch

Diagnostic steps

  1. Check communication between DSF module and PCM
  2. Read DSF module fault codes
  3. Inspect CAN bus wiring to DSF module
  4. Verify software versions match
  5. Test DSF module power supply

Repair notes

Repair CAN bus wiring. Replace DSF module if internal fault. Update software if version mismatch detected.

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