這個碼是什麼意思？
以下表述對應所列原廠與通報。使用前請核對完整故障碼、回報模組、年式與引擎。
故障碼描述偵測到的異常，不直接指定必須更換的零件。
原廠原文中的含義
原文含義可能隨車型與後綴變化。此處依來源顯示，不代表通用診斷結論。
P0421Catalyst 1 Efficiency Below Threshold Bank 1P0421-00Catalyst 1 Efficiency Below Threshold Bank 1P0421Catalyst efficiency below thresholdP0421:00CATALYTIC CONVERTER SYSTEM原廠技術資料
40以下為英文原文
CHEVROLET, GMC
原文故障碼 P0421
This technical bulletin provides repair information to correct a customer concern of Service Engine Soon Lamp being illuminated. They may also comment on multiple transmission issues including harsh or delayed shifts,…
RAM
原文故障碼 P0421
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. The customers may experience a…
RAM
原文故障碼 P0421
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. The customers may experience a…
CHEVROLET, GMC
原文故障碼 P0421
This technical bulletin provides repair information to correct a customer concern of Service Engine Soon Lamp being illuminated with DTCs P2002, P2463, P2459, P144E, P0421, P0422, P0106 P20EE, P129F, P16F3, P20FF,…
CHEVROLET, GMC
原文故障碼 P0421
This technical bulletin provides repair information to correct a customer concern of Service Engine Soon Lamp being illuminated. They may also comment on multiple transmission issues including harsh or delayed shifts,…
CHEVROLET, GMC
原文故障碼 P0421
This technical bulletin provides repair information to correct a customer concern of Service Engine Soon Lamp Illuminated, Harsh or Delayed Transmission Shifts Including Slip, Surge, Shudder, Noise, Whine, Growl, Shake…
核對適用車輛
85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 |
|---|---|---|
| Audi | QUATTRO | 2001 |
| Chevrolet | CRUZE | 2017 |
| Chevrolet | EQUINOX | 2018 |
| Chevrolet | SILVERADO 2500 | 2020 |
| Chevrolet | SILVERADO 3500 | 2020 |
| Ford | PROBE | 1996 |
| GMC | SIERRA 2500 | 2020 |
| GMC | SIERRA 3500 | 2020 |
| GMC | TERRAIN | 2018 |
| Hino | CONVENTIONAL MODELS | 2015 |
| Hino | CONVENTIONAL TRUCKS W/JO8 | 2015 |
| Hino | HINO | 未註明年式 |
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。
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。