Don't replace parts until the root cause is confirmed — many of these codes are caused by wiring, a connector or an upstream fault, not the part itself.
Get the confirmed root cause for U113900 — on YOUR vehicle
A code is a symptom, not a diagnosis. AutoDX Pro cross-checks several
independent assessments, pinpoints the actual root cause, gives you the
exact tests to confirm it, and shows the parts — only after the cause is
confirmed. Reads your scan-tool photo and decodes your VIN with open
recalls.
U113900 is a diagnostic trouble code: High-Voltage Battery Charger no communication (Unauthorized).
What are the common causes of U113900 on a Seat?
Common causes include: No communication established between the high-voltage battery charger and the vehicle/charging infrastructure, Charging connector not detected or not locked properly (resistor in connector not detected), Failure in PWM signal or power-line communication via CP and PE connections, J533 (Data Bus On Board Diagnostic Interface) not authorizing closure of charge contactors. The exact cause depends on the vehicle — confirm it before replacing parts.
Can I keep driving a Seat with U113900?
It depends on the fault and your symptoms. Some causes are minor, others can damage components or affect safety. Get the root cause confirmed before deciding.
How do I fix U113900 on a Seat?
Confirm the actual root cause with targeted tests first, then replace only the part that's at fault. AutoDX Pro gives you the root cause, the exact tests, and the parts for U113900 on your specific Seat.