GUIDE / OBD-II
读懂故障码，再决定如何检修
故障码记录控制模块检测到的异常，不直接判定哪个零件损坏。清码前先保存全部故障码、状态、报码模块和症状。五位基础码后可能有故障类型后缀。采用维修步骤前，确认发动机、年款及销售市场一致。
更换零件之前
记录报码及冻结帧，检查蓄电池状态、相关报码和可见的线束或软管损伤。按照该车诊断流程和测试结果决定维修，避免仅凭故障码换件。
扫描记录表 →有原厂依据的故障码释义
来源与解读范围
先理解含义，再核对所引原厂页码。通用参考说明和限定车型案例的适用范围不同，采用维修指令前须确认具体应用。
- 2000 Powertrain Control/Emissions Diagnosis — Villager OBDII, Description and Operation ↗
Ford Motor Company · PDF 14, 16
Manufacturer example for the 2000 Mercury Villager: module fault detection, code structure and monitor-dependent detection logic. PDF pages are one-based; printed pages 1-14 and 1-16. Historical vehicle-specific documentation, not a current universal code-allocation standard.
- Performing Onboard Diagnostic System Checks as Part of a Vehicle Inspection and Maintenance Program — EPA420-R-01-015, June 2001 ↗
U.S. Environmental Protection Agency
Historical US technical report, inspection-procedure section: retain diagnostic codes and associated freeze-frame information before repair. Supports preserving evidence; not a current global inspection rule. Text edition has no PDF page anchors.