ADDITIONAL ECU - Error value received
â–¶ How to fix
Check the sender ECU (Additional ECU) for primary DTC(s).
What you'll see
No driver-visible symptom recorded.
System reaction
Signals from Additional ECU are not available or erroneous, therefore not used. This can cause various effects. Yellow warning lamp.
Diagnostic depth
Detection
One or more messages contains error value(s) sent by the sender ECU.
Possible cause
Primary DTC in sender ECU (Additional ECU).