Code
ADSP_W016
TESLA
Tesla Alert
Usb Rx Overrun
AI status
Completed
Completed
100%
Causes
- Faulty or low-quality USB cable or connector causing signal integrity issues
- Malfunctioning USB device (phone, flash drive, hub) transmitting malformed or excessive traffic
- Software/firmware bug in ADSP USB driver or host stack leading to buffer mismanagement
- Insufficient CPU/processor resources on ADSP (high load or starvation) preventing timely packet handling
- Power supply or VBUS instability on USB port causing data errors
- Corroded/damaged USB port, loose connector, or poor grounding
Symptoms
- USB device not recognized or intermittently disconnects
- Audio playback from USB skips, stutters, or drops data
- Infotainment system shows USB error messages or warnings
- Slow or failed file transfers from/to USB device
- Intermittent freezes or reduced responsiveness of the infotainment features using USB
- Event or error logged in vehicle diagnostic logs referencing ADSP_W016 or USB Rx errors
What to check
- Attempt to reproduce fault with the same USB device and cable on the same port
- Swap to a known-good USB cable and a different known-good device
- Try the suspect device on a different USB port or an external PC to confirm device behavior
- Inspect USB port and connector for damage, debris, corrosion, or bent pins
- Check vehicle software/firmware version and known bulletins for USB-related fixes
- Review ADSP/infotainment diagnostic logs for timestamps, repeat patterns, and error frequency
Signal parameters
- VBUS voltage (nominal ~5.0 V) and transient tolerance
- D+ / D- differential signal integrity (eye diagram, voltage levels, rise/fall times)
- Packet error counters and CRC/frame error rates
- USB transfer types and endpoints in use (bulk, interrupt, isochronous)
- Rx buffer fill/overflow counts, dropped packet counters, and IRQ latency
- Transfer throughput (MB/s) and burst rates at time of fault
Diagnostic algorithm
- Record conditions when the fault occurs (device type, cable, port, software version, time).
- Reproduce with the same device and cable. If fault reproduces, swap cable and try a different, known-good USB device.
- Test the suspect device and cable on another host (PC) to rule out device-side faults.
- Try the suspect device in another vehicle USB port (if available) to check port-specific issues.
- Inspect physical port and connector for damage; clean debris with appropriate non-conductive methods if present.
- Check vehicle logs/telemetry for related errors and frequency. Note whether errors coincide with heavy system load or other events (charging, updates).
- Verify VBUS and ground voltages at the port during idle and during device connection; look for drops or noise.
- If available, capture USB traffic with a protocol analyzer or oscilloscope to confirm overruns, malformed packets, or excessive retries.
- Ensure vehicle and ADSP firmware/software are up to date; apply known fixes or reflash ADSP firmware if a software bug is suspected.
- If tests show port hardware issues (repeated failures only on one port) consider repairing or replacing the USB connector/port or ADSP module per manufacturer procedure.
- If all external devices and cables are good and firmware is current but errors persist, escalate for module-level diagnostics or replacement following manufacturer guidance.
Likely causes
- Intermittent issue caused by a particular USB device or cable (most common)
- USB driver/firmware handling bug after a software update
- Damaged USB port or connector on the vehicle module
- Overloaded ADSP due to concurrent high-priority tasks or memory pressure
Fault status
Status
USB Rx overrun detected by ADSP — receive buffer overflow or processing backlog resulted in dropped USB packets. Intermittent data loss on USB Rx path.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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