這個碼是什麼意思？
控制器在監測條件下判斷觸媒效率不足。P0420 對應第 1 汽缸列，P0430 對應第 2 汽缸列。應檢查排氣漏氣、失火與混合氣相關碼，依車型評估感知器訊號及觸媒測試。故障碼本身不證明必須換觸媒或含氧感知器。
來源與解讀範圍 [1]
故障碼描述偵測到的異常，不直接指定必須更換的零件。
原廠技術資料
13以下為英文原文
CADILLAC, CHEVROLET, GMC
原文故障碼 P0420
This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on at low mileage. Technician…
CADILLAC, CHEVROLET, GMC, HUMMER
原文故障碼 P0420
This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on at low mileage. Technician…
CHEVROLET, GMC
原文故障碼 P0420
This Preliminary Information communication provides information to the technician of additional information while diagnosing a diagnostic trouble code P0420. Check for a possible leak in the exhaust system behind the…
CHEVROLET, GMC
原文故障碼 P0420
This Preliminary Information communication provides information to the technician with additional information while diagnosing a diagnostic trouble code P0420. Check for a possible leak in the exhaust system behind the…
CHEVROLET, GMC
原文故障碼 P0420
This Preliminary Information communication provides information to the technician about vehicles that have a Malfunction Indicator Lamp on. Technician may find a P0420, P24A0 and/or P2463 set. Technician should use…
CHEVROLET, GMC
原文故障碼 P0420
This Preliminary Information communication provides information to the technician about vehicles that have a Malfunction Indicator Lamp on. Technician may find a P0420, P24A0 and/or P2463 set. Technician should use…
核對適用車輛
17車型關聯可作查閱線索；引擎、生產範圍與軟體條件請核對原廠資料。
| 品牌 | 車型 | 年式 |
|---|---|---|
| Chevrolet | EXPRESS | 2018 |
| Chevrolet | EXPRESS | 2017 |
| Chevrolet | EXPRESS | 2016 |
| Chevrolet | EXPRESS | 2015 |
| Chevrolet | EXPRESS | 2014 |
| Chevrolet | EXPRESS | 2013 |
| Chevrolet | EXPRESS | 2012 |
| Chevrolet | EXPRESS | 2011 |
| Chevrolet | EXPRESS | 2010 |
| Chevrolet | EXPRESS | 2009 |
| Chevrolet | EXPRESS | 2008 |
| Chevrolet | EXPRESS | 2007 |
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。
來源與解讀範圍
以下解釋由本站依所列原廠資料整理。頁碼從 PDF 檔案第一頁起算。原文為英文，譯文供參考；引用某版本不代表它是原廠目前最新指令。
- 2024–2025 MY OBD System Operation Summary for Gasoline Engines ↗
Ford Motor Company · PDF 頁碼 2, 3 ·
來源核對日期 · 2026-10-27
還能繼續駕駛嗎？
不能只憑故障碼判斷能否繼續行駛。故障燈閃爍、嚴重抖動、過熱、機油壓力警示或煞車轉向異常需立即注意。影響操控或引擎安全時，應在安全地點停車並求助。以車主手冊為準。