參考含義
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。
限定車輛範圍
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。
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 →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 1
P0421-00Catalyst 1 Efficiency Below Threshold Bank 1
P0421Catalyst efficiency below threshold
原廠技術資料
40以下為英文原文
CHEVROLET, GMC
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, slip, surge, shudder, noise, whine, growl, shake and/or vibration. As well as the exhaust brake not working or t…
RAM
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 Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the …
RAM
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 Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the …
CHEVROLET, GMC
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, P226D, P249D, P249E, P11CC and / or P11D5. They may also comment on multiple transmission issues including harsh or …
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 |
故障碼含義與原廠資料
以下為英文原文 · 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。
Warm Up Catalyst Efficiency Below Threshold (Bank 1)
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。