Autel Diagnostics Diagnostics & Fault Manuals
Autel MaxiSys Ultra and MaxiCOM professional bidirectional automotive diagnostic tablets, ECU online coding, and CAN-FD bus analyzers.
Equipment Models
Hardware families produced by Autel Diagnostics
Indexed Error Codes for Autel Diagnostics
Machine-verified error code diagnostic walkthroughs
VCI Bluetooth Drops Error 02
Error 02 indicates a persistent packet drop or baud-rate desynchronization between the MaxiVCI V200 interface and the tablet's Bluetooth baseband processor, typically induced by vehicle DLC bus contention, low battery terminal voltage (<11.8V), or corrupted VCI transceiver firmware.
Catalytic Converter Bank 1 Inefficiency
The ECM/PCM has detected that Bank 1 catalytic converter oxygen storage capacity has degraded below the calibrated emissions threshold. Downstream O2 sensor (Sensor 2) voltage switching frequency mirrors upstream O2 sensor (Sensor 1) switching, indicating compromised exhaust reduction.