Red charging error on Audi

Red charging error on Audi: what it means and how to clear it

A red light on the charger, or a red charging warning in the Audi's MMI, simply means the session stopped or never started cleanly. It is not, on its own, a sign of damage to the car or the battery. It's a status code that says "something in the handshake didn't agree". The job is to find which part.

This applies to both Audi BEVs on CCS Combo 2 and PHEVs on Type 2.

What a red indicator typically means

Different chargers use different colour schemes, but red almost always covers one of these:

  • Handshake or authentication failure between car, charger, and operator backend.
  • Earth or ground fault detected by the charger's safety circuits, common on MEB-platform Audis (Q4 e-tron) at stations with marginal earthing.
  • Over-temperature in the cable, plug, or charger.
  • Voltage or current out of range from the supply.
  • Loss of communication mid-session, often because the plug wasn't fully seated.

How to clear it without overreacting

  1. Stop and unplug. Wait 30 seconds. Many chargers latch the fault state and need a clean reset.
  2. Lock and unlock the car, then plug in again. This re-triggers the in-car charge controller.
  3. Check the plug seats fully with a firm push until the latch clicks.
  4. Try another bay or another network. If the next station works first time, the original charger was the issue, not your Audi.
  5. Inspect the cable. Look for melted plastic at either end, discolouration on the pins, or any sign of heat damage. If you see any, stop using it and replace it. A worn lead is a common silent cause of repeated red faults, and swapping to a known-good Voldt Audi-compatible Type 2 charging cable removes the cable as a suspect in one test.
  6. Note any error message text shown on the charger or in the myAudi app. "Error in the charging infrastructure" on Q4 e-tron specifically points to earthing/ground at that station, not the car.
  7. If red persists across multiple stations, book an Audi service appointment. Don't keep retrying repeatedly: that won't damage the car, but it won't solve anything either.

Bottom line

Red almost always means "this attempt didn't agree", not "your car is broken". Unplug, reset, try a different station, swap the cable to rule it out, and only escalate to a dealer if the same fault follows the car everywhere.