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GUIDE / OBD-II

就緒狀態不等於沒有故障

就緒監測表示重設後所支援的診斷測試是否完成。清碼或斷開電瓶可能使其重設。未完成不證明零件損壞，全部完成也不保證整車無故障。啟動條件和行駛循環因車而異。請依原廠程序和當地檢驗規則，不要只按固定里程判斷。

更換零件之前

記錄故障碼與凍結資料，檢查電瓶狀態、相關故障碼和可見線束或軟管損傷。依該車診斷程序與測試結果決定維修，避免僅憑故障碼換件。

掃描記錄表 →

有原廠依據的故障碼釋義

P0300隨機或多缸失火P0420觸媒系統效率低於門檻 · 汽缸列 1P0171混合氣過稀 · 汽缸列 1P0299渦輪／機械增壓器 A 增壓不足

來源與解讀範圍

先理解含義，再核對引用的原廠頁碼。參考說明與限定車型案例範圍不同，採用維修指令前須確認應用。

  1. On-Board Diagnostic Test Reference — Section C, Readiness monitor standards ↗

    California Bureau of Automotive Repair

    California reference explains readiness self-tests, vehicle-specific enable conditions and the effect of battery disconnection or repairs. Supports using manufacturer drive-cycle instructions; its inspection tables and exceptions apply only within the California program.

  2. 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 report, Readiness Status sections, printed pages 10–15: evaluated/not-evaluated status, manufacturer-dependent enabling conditions, reset effects and why incomplete status alone does not establish an emissions defect. Its old monitor inventory, test allowances and suggested driving duration are not current worldwide guidance.