GUIDE / OBD-II
旧通报还有参考价值吗？
旧资料对对应年代的车辆仍可能适用，日期早不代表内容失效。请核查明确替代声明、车型、发动机、生产范围、症状和软件。技术通报不自动等于召回，也不保证免费维修。本索引使用美国 NHTSA 厂商资料；此处无记录不代表其他市场没有相关文件。
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。
- Manufacturer Communications — Overview and Access to Publicly Available Manufacturer Communications ↗
National Highway Traffic Safety Administration
Defines the US manufacturer-communications collection, including service notices, warranty/policy extensions and both safety-related and non-safety defects; explains public publication. Presence in this collection alone is not evidence of a recall, warranty entitlement or worldwide applicability.
- 21-NA-146 — MIL Illuminated, DTC P0011 and/or P0014 Set — June 2021 ↗
General Motors · PDF 1, 2, 3
Applicability/version example only: 2019 Chevrolet Silverado 1500 and GMC Sierra 1500 New Model with L3B 2.7L, specified regions. Replaces PIP5648; instructions differ by production date and warn against assuming vehicle applicability. This archived version is not asserted to be the latest service instruction.