参考含义
这个码是什么意思？
P0442 表示小泄漏，P0455 表示大泄漏，P0456 表示极小泄漏。检查适用车型的油箱盖密封、软管、阀门，并采用厂商检漏程序。油箱盖松动只是可能原因之一。不要在燃油蒸气附近使用压缩空气或明火自行测试。
来源与解读范围 [1]
故障码描述检测到的异常，不直接指定必须更换的零件。
限定车辆范围
车型关联可作为查阅线索；具体发动机、生产范围和软件条件请核对厂商资料。
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 →厂商原文中的含义
原文含义可能随车型和后缀变化。此处按来源展示，不代表通用诊断结论。
P0456EVAP System Small Leak
P0456EVAP System Small Leak
P0456EVAP System Small Leak.If DTC
厂商技术资料
636以下为英文原文
ACURA
Service Bulletin - The factory fuel fill pipe assembly may not have been manufactured to specification. As a result, small contamination particles inside the fuel fill neck may prevent the primary shut-off valve flap seal from sealing properly. This may result in a fuel smell from the fuel fill neck area and may cause DTC P0455 …
ACURA
Service Bulletin - The factory fuel fill pipe assembly may not have been manufactured to specification. As a result, small contamination particles inside the fuel fill neck may prevent the primary shut-off valve flap seal from sealing properly. This may result in a fuel smell from the fuel fill neck area and may cause DTC P0455 …
ACURA
Dealer Message - The fuel fill pipe assembly may not have been manufactured to specification. As a result, small contamination particles inside the fuel fill neck may prevent the primary shut-off valve flap seal from sealing, resulting in fuel smell from the fuel fill neck area and may cause DTC P0455 or P0456 (EVAP system leak …
AUDI
Summary of all Vin-4-Pin topics for August Check engine light after charging Rattle noise from sound generator Vehicle sound malfunction warning Oil leak from oil filter drain off valve CEL: P003A00 Turbo Boost control A CEL: P045600
核对适用车辆
2056车型关联可作为查阅线索；具体发动机、生产范围和软件条件请核对厂商资料。
来源与解读范围
以下解释由本站依据所列原厂资料整理。页码从 PDF 文件第一页计数。原文为英文，译文供查阅参考；引用某个版本不代表它就是厂商当前最新指令。
- 2024–2025 MY OBD System Operation Summary for Gasoline Engines ↗
Ford Motor Company · PDF 页码 13, 14 · 2024-04-16
来源核对日期 · 2026-10-27
还能继续驾驶吗？
仅靠故障码无法判断是否适合继续行驶。故障灯闪烁、严重抖动、过热、机油压力报警或制动转向异常都需及时处理。影响车辆控制或发动机安全时，应在安全地点停车并寻求帮助。以车辆手册为准。