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Selected vehicle: 2006 · GMC Yukon XL Denali

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Source reference 10113325

Manufacturer communication — 2006 GMC YUKON DENALI XL

Fitment confirmedReporter type: ManufacturerENGINEENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTORPOWER TRAIN

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

PIP3119N ・ fault and correction ・ names this vehicle

Applies to

  • The model list names 2004 - 2017 GMC Savana, Sierra, Sierra Hybrid, Yukon and Yukon Hybrid.

    the passage
    2004 - 2017 GMC Savana, Sierra, Sierra Hybrid, Yukon, Yukon Hybrid

Fault

  • An SES light may appear on low mileage vehicles or after a recent catalytic converter replacement.

    the passage
    A SES light may be experienced on low mileage vehicles, or vehicles that have recently had thecatalytic converter replaced.

  • DTCs P0420 and/or P0430 may be stored.

    the passage
    Upon inspection, DTCs P0420 and/or P0430 may be stored.

Finding the cause

Possible causes

  • After a converter replacement the engine run time restrictions are no longer in place because the vehicle is no longer new, so the converter may not complete a thorough break-in cycle, possibly resulting in a false DTC P0420 and/or P0430.

    the passage
    If the DTCs set shortly after the catalytic converter is replaced, it may be a result of the engine runtime restrictions no longer being in place since the vehicle is no longer new. As a result, the catalyticconverter may not have completed a thorough break-in cycle after replacement, possibly resulting ina 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 verify engine run time on the Engine Hour Meter in the IPC data display.

    the passage
    If these DTCs are found on a new/low mileage vehicle, use the Tech 2 to verify engine run time onthe Engine Hour Meter in the IPC Data Display/Data 1 List.

Correction

Repair

  1. Clear the DTCs and perform the drive cycle described in the document.

    the passage
    If this occurs, clear the DTCs and perform the drive cycle below.

  2. Drive cycle step: drive at sustained highway speed for 25 to 30 minutes, then stop.

    the passage
    Drive vehicle at sustained highway speed for 25 to 30 minutes 2. Bring vehicle to a stop

  3. Drive cycle step: after the engine has been off for 1 minute, restart and resume highway speed for an additional 10 to 15 minutes.

    the passage
    Shut off the engine for 1 minute 4. Restart the engine and resume highway speed for an additional 10 to 15 minutes

  4. If the diagnostics do not pass after the drive cycle, 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

  1. Communication summary

    本予備情報通知は、低走行距離でサービスエンジンスーン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車両の診断と修理の手順について技術者に情報を提供するものです。技術者は診断トラブルコードP0420および/またはP0430が格納されている可能性があります。技術者は、触媒コンバーター効率診断トラブルコードP0420およびP0430が触媒コンバーターの慣らし運転を許可するためにエンジン始動後最初の1時間は無効になることについて助言される必要があります。技術者はTech2を使用して、スキャンツールの一致メータークラスターデータディスプレイ/データ1リストのエンジンアワーメーター上でエンジン始動時間を確認して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、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。技術者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、車両がもはや新しくないため、エンジン始動時間の制限がもはや有効でないことが原因である可能性があります。技術者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
10113325
Received by source
2017-08-15
Incident date
Unknown

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Manufacturer communication 10113325 — 2006 GMC YUKON DENALI XL | FaultCrate