19NA127

Service Bulletin
Bulletin No.:
19-NA-127
Date:
June, 2019
INFORMATION
Subject:
Check Engine Light Illuminated with DTC’s P0106, P0046, P20EE, P249D, and/or
P249E Set
Brand:
Model:
Chevrolet
GMC
Model Year:
VIN:
from
to
Colorado
2019
2019
Canyon
2019
2019
Involved Region or Country
from
Engine:
Transmission:
LWN
All
to
North America, N.A. Export Regions
Additional Options (RPOs)
Condition
Cause
Correction
Some customers may comment on a check engine light on the Driver Information
Center (DIC) illuminated.
Some technicians may find one or more of the following DTCs set in the Engine Control
Module (ECM):
• P0106: Manifold Absolute Pressure (MAP) Sensor Performance
• P0046: Turbocharger Boost Control Position Performance
• P20EE: NOx Catalyst Efficiency Below Threshold
• P249D: Closed Loop Reductant Injection Control At Limit - Flow Too Low
• P249E: Closed Loop Reductant Injection Control At Limit - Flow Too High
The cause of the condition may be an ECM software anomally.
Important: For vehicles registered in Canada, please see field action N192220100.
Check the Engine Control Module (ECM) for the latest update:
• If the software version is not the latest update, reprogram the ECM following the
Service Procedure below.
• If the ECM has already been updated, continue with SI diagnostics for the codes set in
the ECM.
Service Procedure
If programming the ECM then refer to K20 Engine
Control Module: Programming and Setup in SI.
Note: Stable battery voltage is critical during
programming. Any fluctuation, spiking, over voltage or
loss of voltage will interrupt programming. Install a GM
Authorized Programming Support Tool to maintain
system voltage. Refer to for further information. If not
available, connect a fully charged 12 V jumper or
booster pack disconnected from the AC voltage supply.
DO NOT connect a battery charger
Parts Information
No parts are required for this repair.
Copyright 2019 General Motors LLC. All Rights Reserved.
Page 2
June, 2019
Bulletin No.: 19-NA-127
Warranty Information
For vehicles repaired under the Powertrain coverage,
use the following labor operation. Reference the
Applicable Warranties section of Investigate Vehicle
History (IVH) for coverage information.
Labor Operation
Description
Labor Time
*2886308
Engine Control Module Reprogramming with SPS
0.3
*This is a unique Labor Operation for Bulletin use only.
*To avoid warranty transaction rejections, the SPS Warranty Claim Code must be entered when submitting this transaction.
When more than one Warranty Claim Code is generated for a control module programming event, it is required to document all
Warranty Claim Codes in the Correction field on the Job Card. Dealers must only enter one code in the “SPS Warranty Claim
Code” field on the transaction, otherwise the transaction will reject.
Warranty Claim Code Information Retrieval
If the SPS Warranty Claim Code was not recorded on
the Job Card, the code can be retrieved in the SPS
system as follows:
• Open TIS on the computer used to program the
vehicle.
• Select and start SPS.
• Select Settings.
• Select the Warranty Claim Code tab.
The VIN, Warranty Claim Code and Date/Time will be
listed on a roster of recent programming events. If the
code is retrievable, dealers should resubmit the
transaction making sure to include the code in the SPS
Warranty Claim Code field.
Version
1
Modified
Released June 11, 2019
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
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