这个码是什么意思？
以下表述对应所列厂商与通报。使用前请核对完整报码、报码模块、年款和发动机。
故障码描述检测到的异常，不直接指定必须更换的零件。
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。
P2420Evaporative Emission Pressure Switching Valve Stuck OffP2420Evaporative Emission Pressure Switching Valve Stuck OFF厂商技术资料
5以下为英文原文
TOYOTA
原文报码 P2420
TSB: REVISION NOTICE February 06, 2018 Rev1: ? Applicability has been updated to include 2016 ? 2018 model year Corolla vehicles. ? The Required Tools & Equipment section has been updated. Any previous printed versions…
TOYOTA
原文报码 P2420
TSB: Some 2014 - 2015 model year Corolla vehicles equipped with a 2ZR-FE or 2ZR-FAE engine may exhibit a MIL "ON" condition with Diagnostic Trouble Code (DTC) P2420 (Evaporative Emission Pressure Switching Valve Stuck…
SCION
原文报码 P2420
SCION: SOME MODELS MAY EXHIBIT A MIL ON CONDITION WITH DIAGNOSTIC TROUBLE CODE(DTC) P2420 STORED. THIS TSB APPLIES TO VEHICLES PRODUCED WITHIN THE PRODUCTION CHANGE. *PE
TOYOTA
原文报码 P2420
MALFUNCTION INDICATOR LAMP (MIL) ON WITH DIAGNOSTIC TROUBLE CODE (DTC) P0171 P0441, P2420 AND/OR P0455. *TT
PONTIAC
原文报码 P2420
A CHECK ENGINE LIGHT MAY BE EXPERIENCED WITH DTCS P0171, P0441, P0455 AND/OR P2420 - INSPECT PRODUCTION PART NUMBER ON PCM. *TT
核对适用车辆
12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。
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。