Source reference 10156912
Manufacturer communication — 2006 GMC YUKON DENALI
Relation to the target vehicle
- The source's vehicle field says Yukon; whether it is an XL is not stated.
- Model year
- Match 2006 — Source vehicle field
- Model
- Unknown YUKON DENALI — Source vehicle field
- Trim
- Match Denali — Source vehicle field
What the manufacturer’s document says
PIP3119P ・ fault and correction ・ names this vehicle
Applies to
Applies to GMC Yukon models, 2002 - 2018, with a V8 engine.
the passage
Yukon Models 2002 - 2018 All All V8 ALL
Fault
An SES light may come on on low mileage vehicles or vehicles that recently had the catalytic converter replaced, with DTCs P0420 and/or P0430 stored.
the passage
A SES light may be experienced on low mileage vehicles, or vehicles that have recently had the catalytic converter replaced. Upon inspection, DTCs P0420 and/or P0430 may be stored.
Finding the cause
Possible causes
On a new vehicle, catalytic converter efficiency DTCs P0420 and P0430 are disabled for the first hour of engine run time to allow break-in of the catalytic converter.
the passage
On a new vehicle, catalytic converter efficiency DTCs P0420 and P0430 are disabled for the first hour of engine run time to allow break-in of the catalytic converter.
If the engine run time is less than one hour, the battery may have been disconnected, or another vehicle power loss event may have occurred, during vehicle manufacturing.
the passage
If the engine run time is less than one hour, the battery may have been disconnected, or another vehicle power loss event may have occurred, during vehicle manufacturing.
If the DTCs set shortly after the catalytic converter is replaced, it may be because the engine run time restrictions are no longer in place since the vehicle is no longer new.
the passage
If the DTCs set shortly after the catalytic converter is replaced, it may be a result of the engine run time restrictions no longer being in place since the vehicle is no longer new.
As a result, the catalytic converter may not have completed a thorough break-in cycle after replacement, possibly resulting in a false DTC P0420 and/or P0430.
the passage
the catalytic converter may not have completed a thorough break-in cycle after replacement, possibly resulting in a false DTC P0420 and/or P0430.
Steps to confirm (in the document’s order)
On a new/low mileage vehicle with these DTCs, use the Tech 2 to verify engine run time on the Engine Hour Meter in the IPC Data Display/Data 1 List.
the passage
If these DTCs are found on a new/low mileage vehicle, use the Tech 2 to verify engine run time on the Engine Hour Meter in the IPC Data Display/Data 1 List.
Finally, restart the engine and operate the vehicle at the conditions for running the DTC P0420/430 tests, and make sure the vehicle passes them.
the passage
Restart the engine and operate vehicle at the conditions for running the DTC P0420/430 tests and assure that the vehicle passes these diagnostic tests.
Correction
Repair
Clear the DTCs and perform the drive cycle given in the document.
the passage
If this occurs, clear the DTCs and perform the drive cycle below.
Drive cycle step: drive the vehicle at sustained highway speed for 25 to 30 minutes.
the passage
Drive vehicle at sustained highway speed for 25 to 30 minutes
Drive cycle step: restart the engine and resume highway speed for an additional 10 to 15 minutes.
the passage
Restart the engine and resume highway speed for an additional 10 to 15 minutes
If the diagnostics do not pass, perform SI diagnostics and repair as necessary.
the passage
If the diagnostics do not pass, perform SI diagnostics and repair as necessary.
Compiled by reading the full text of the document; each point stands on the passage shown. Check the document itself, linked below, before working on a vehicle.
Stated content
Communication summary
本予備情報通知は、低走行距離でService Engine Soon マルファンクションインジケーターランプが点灯している可能性のある車両の診断および修理手順に関する情報をテクニシャンに提供します。テクニシャンは診断トラブルコードP0420およびまたはP0430が格納されているのを発見する場合があります。テクニシャンは、触媒コンバーター効率の診断トラブルコードP0420およびP0430が触媒コンバーターの初期化を許可するためにエンジン始動時間の最初の1時間は無効になることを知らされるべきです。テクニシャンはTech2を使用してメータークラスターの「Data Display/Data 1 List」内のエンジンアワーメーターのエンジン始動時間を確認して、スキャンツールマッチを検証する必要があります。エンジン始動時間が1時間未満の場合、車両製造中にバッテリーが切断されたか、または別の車両電源喪失イベントが発生した可能性があります。テクニシャンは診断トラブルコードをクリアしてドライブサイクルを実行する必要があります。触媒コンバーターが交換され、診断トラブルコードが設定された場合、車両が新しいものではなくなったため、エンジン始動時間の制限が不再にある結果である可能性があります。テクニシャンは診断トラブルコードをクリアしてドライブサイクルを実行する必要があります。 Machine translation (unreviewed)
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 may find Diagnostic Trouble Codes P0420 and or P0430 stored. Technician should be advised that the catalytic converter efficiency Diagnostic Trouble Codes P0420 and P0430 are disabled for the first hour of engine run time to allow break-in of the catalytic converter. Technician will need to use a Tech2 to check the verify engine run time on the Engine Hour Meter in the Instrument Panel Cluster  Data Display/Data 1 List in the scan tool match. If the engine run time is less than one hour, the battery may have been disconnected, or another vehicle power loss event may have occurred, during vehicle manufacturing. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle. If the catalytic converter was replaced and the Diagnostic Trouble Codes set it may be a result of the engine run time restrictions no longer being in place since the vehicle is no longer new. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle.
Go to this passage in the original
Source
- Source
- NHTSA Manufacturer Communications
- Source reference
- 10156912
- Received by source
- 2019-04-08
- Incident date
- Unknown
Open original text and sourceOpen the provider's page (external)