| Failure code | Description |
| Working modules | |
| 000 | Standard module |
| 001 | Reworked module |
| 002 | Usable, but with not standard behaviour |
| 005 | Usable, but with high leakage current at 150 V |
| 006 | Double peak structure in source average ToT |
| FE failures | |
| 100 | Global register failure |
| 101 | Pixel register failure affecting one column pair |
| 102 | VDDA short |
| 103 | VDD short |
| 104 | Bad XCK connection |
| 105 | No answer to analog injection |
| 106 | Complete pixel register failure |
| 107 | Connection between VDDD and VDDA |
| 108 | Bad LVDS channels on FE side |
| 199 | Damaged by handling |
| MCC failures | |
| 200 | Register failures |
| 201 | Data out failure |
| 202 | Failures of signals to FE |
| 203 | FIFO failures |
| 204 | Too high threshold voltage |
| Pigtail/Type-0 cable failures | |
| 300 | Broken HV line |
| 301 | Broken signal line |
| 302 | Broken sense line |
| 303 | Damaged elco |
| 304 | Disconnected elco HV pad |
| 305 | Disconnected elco signal pad |
| 306 | Disconnected elco sense pad |
| 399 | Mechanical problems |
| Flex + assembly failures | |
| 400 | Disconnected pigtail wire bond/ type-0 cable bond |
| 401 | Disconnected pigtail HV wire bond/ type-0 cable bond |
| 402 | Disconnected FE wire bonds |
| 403 | Disconnected MCC wire bonds |
| 404 | Data out connections |
| 405 | Power line short |
| 406 | Signal line short |
| Sensor/bumping failure code | |
| 500 | Excessive leakage current |
| 501 | Excessive number of merged channels |
| 502 | Excessive number of disconnected channels |
| 599 | Damaged by handling |
| Performance failures | |
| 900 | Generic bad performances |
| 901 | Excessive noise |
| 902 | Excessive cross talk |
| 903 | Excessive number of untunable pixels |
| Status modifiers | |
| - | Bare module/Flex hybrid |
| +1000 | Detected at ASSY stage |
| +2000 | Detected at BURN stage |
| +3000 | Detected at FLEX stage |
| +4000 | Detected at RECV stage |
| +5000 | Detected after mounted on local support |
| +6000 | Detected after local support burn-in |
| -1* | Repaired from a failure |