Source reference 10112069
Manufacturer communication — 2006 GMC YUKON DENALI XL
Relation to the target vehicle
- The source's vehicle field includes the trim.
- Model year
- Match 2006 — Source vehicle field
- Model
- Match YUKON DENALI XL — Source vehicle field
- Trim
- Match Denali — Source vehicle field
What the manufacturer’s document says
PIP3119M ・ fault and correction ・ names this vehicle
Applies to
Applies to 2004 - 2015 GMC Savana, Sierra, Sierra Hybrid, Yukon and Yukon Hybrid (note: the Yukon years run later than the years this service covers).
the passage
2004 - 2015 GMC Savana, Sierra, Sierra Hybrid, Yukon, Yukon Hybrid
Only vehicles with a gasoline V8 engine are covered.
the passage
With a V8 Engine (gas only)
Fault
The SES light may come on with DTC P0420 and/or P0430 stored on low mileage vehicles or on vehicles whose catalytic converter was recently replaced.
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 the catalyst efficiency DTCs P0420 and P0430 are disabled for the first hour of engine run time so the converter can break in.
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.
After a converter replacement the run-time restriction is no longer in place, so the new converter may not have finished breaking in and a false DTC P0420 and/or P0430 can set.
the passage
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.
Steps to confirm (in the document’s order)
On a new or low mileage vehicle, use the Tech 2 to read the 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.
Correction
Repair
If this is the case, clear the DTCs and perform the break-in drive cycle.
the passage
If this occurs, clear the DTCs and perform the drive cycle below.
Drive cycle step: drive 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: after stopping and shutting off, 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
Finally restart the engine, run the vehicle at the conditions for the DTC P0420/430 tests and make sure it 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.
If the diagnostics do not pass, perform the SI diagnostics and repair as necessary.
the passage
If the diagnostics do not pass, perform SI diagnostics and repair as necessary.
What is needed
- Parts and materials
- Not stated
- Labor time
- Not stated
- Special tools
- Not stated
- Scan tool
- Not stated
Only what the technical documents state. "Not stated" does not mean not needed.
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、低走行距離でエンジン警告灯（Service Engine Soon）が点灯する可能性のある車両の診断および修理手順について整備士に情報を提供するものです。整備士は診断コードP0420および/またはP0430が記憶されている可能性があります。整備士は、触媒コンバーター効率診断コードP0420およびP0430は、触媒コンバーターのブレークインを許可するためにエンジン始動時の最初の1時間無効になることを知らされるべきです。整備士はTech2を使用してメーター データ表示/スキャンツールのデータ1リストのエンジンアワーメーターでエンジン始動時間を確認して一致させる必要があります。エンジン始動時間が1時間未満の場合、バッテリーが切断されたか、または車両製造中に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。整備士は診断コードをクリアし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コードが入った場合、車両がもはや新車ではなくなったため、エンジン始動時間制限が解除されたことが原因である可能性があります。整備士は診断コードをクリアし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
- 10112069
- Received by source
- 2017-08-15
- Incident date
- Unknown
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