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GUIDE / OBD-II

清碼前保存凍結資料

凍結資料反映記錄故障時的部分工況。工具支援時，保存轉速、負載、水溫、車速、燃油系統狀態與燃油修正。快照可能只對應某個故障，並非連續記錄。清碼可能刪除資料並重設就緒狀態。駕駛時不要操作掃描器。

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. 2000 Powertrain Control/Emissions Diagnosis — Villager OBDII, Description and Operation ↗

    Ford Motor Company · PDF 14, 18

    2000 Mercury Villager example: stored operating conditions at fault detection, scan-tool access and single-event priority/replacement behavior. Printed pages 1-14 and 1-18. Does not establish how many frames every modern control module supports.

  2. On-Board Diagnostic Hand-Held Scan Tool Technology — EPA420-R-00-017, October 2000 ↗

    U.S. Environmental Protection Agency

    Historical emissions scan-tool report, printed page 6: Mode 2 retrieves freeze-frame information; Mode 4 resets emissions diagnostic information including freeze frame and readiness. Background for preserving data before clearing, not validation of a current scanner or every module. Text edition has no PDF page anchors.