| U0001 | OBD-II Network Error Code U0001: How to Fix It | high | Medium |
| U0002 | OBD-II Network Error Code U0002: How to Fix It | high | Medium |
| U0003 | OBD-II Network Error Code U0003: How to Fix It | high | Hard |
| U0004 | OBD-II Network Error Code U0004: How to Fix It | high | Hard |
| U0007 | OBD-II Network Error Code U0007: How to Fix It | high | Hard |
| U0010 | OBD-II Network Error Code U0010: How to Fix It | medium | Medium |
| U0028 | OBD-II Network Error Code U0028: How to Fix It | medium | Medium |
| U0073 | OBD-II Network Error Code U0073: How to Fix It | high | Hard |
| U0100 | OBD-II Network Error Code U0100: How to Fix It | high | Medium |
| U0101 | OBD-II Network Error Code U0101: How to Fix It | high | Medium |
| U0102 | OBD-II Network Error Code U0102: How to Fix It | medium | Medium |
| U0103 | OBD-II Network Error Code U0103: How to Fix It | medium | Medium |
| U0104 | OBD-II Network Error Code U0104: How to Fix It | low | Medium |
| U0105 | OBD-II Network Error Code U0105: How to Fix It | high | Medium |
| U0106 | OBD-II Network Error Code U0106: How to Fix It | medium | Medium |
| U0109 | OBD-II Network Error Code U0109: How to Fix It | high | Medium |
| U0110 | OBD-II Network Error Code U0110: How to Fix It | high | Medium |
| U0111 | OBD-II Network Error Code U0111: How to Fix It | high | Medium |
| U0114 | OBD-II Network Error Code U0114: How to Fix It | medium | Medium |
| U0121 | OBD-II Network Error Code U0121: How to Fix It | high | Medium |
| U0122 | OBD-II Network Error Code U0122: How to Fix It | high | Medium |
| U0123 | OBD-II Network Error Code U0123: How to Fix It | high | Medium |
| U0124 | OBD-II Network Error Code U0124: How to Fix It | high | Medium |
| U0125 | OBD-II Network Error Code U0125: How to Fix It | high | Medium |
| U0126 | OBD-II Network Error Code U0126: How to Fix It | high | Medium |
| U0128 | OBD-II Network Error Code U0128: How to Fix It | high | Medium |
| U0131 | OBD-II Network Error Code U0131: How to Fix It | high | Medium |
| U0140 | OBD-II Network Error Code U0140: How to Fix It | medium | Medium |
| U0141 | OBD-II Network Error Code U0141: How to Fix It | medium | Medium |
| U0151 | OBD-II Network Error Code U0151: How to Fix It | critical | Medium |
| U0155 | OBD-II Network Error Code U0155: How to Fix It | medium | Medium |
| U0164 | OBD-II Network Error Code U0164: How to Fix It | low | Medium |
| U0167 | OBD-II Network Error Code U0167: How to Fix It | critical | Medium |
| U0184 | OBD-II Network Error Code U0184: How to Fix It | low | Medium |
| U0186 | OBD-II Network Error Code U0186: How to Fix It | low | Medium |
| U0199 | OBD-II Network Error Code U0199: How to Fix It | low | Medium |
| U0214 | OBD-II Network Error Code U0214: How to Fix It | low | Easy |
| U0235 | OBD-II Network Error Code U0235: How to Fix It | medium | Medium |
| U0300 | OBD-II Network Error Code U0300: How to Fix It | high | Hard |
| U0301 | OBD-II Network Error Code U0301: How to Fix It | high | Hard |
| U0401 | OBD-II Network Error Code U0401: How to Fix It | high | Medium |
| U0402 | OBD-II Network Error Code U0402: How to Fix It | high | Medium |
| U0415 | OBD-II Network Error Code U0415: How to Fix It | high | Medium |
| U0418 | OBD-II Network Error Code U0418: How to Fix It | high | Medium |
| U0422 | OBD-II Network Error Code U0422: How to Fix It | medium | Medium |
| U0428 | OBD-II Network Error Code U0428: How to Fix It | high | Medium |
| U0429 | OBD-II Network Error Code U0429: How to Fix It | high | Medium |