PIE0706

Bulletin No.: PIE0706
Date: Jun-2022
Subject:
Engineering Information - Investigation to Better Understand the Conditions that Cause Mechanical Seal Loss of NOx
Sensors, DTCs P2A00, P2A01, P2A02 and/or P22FB Set
Attention:
Proceed with this EI ONLY if the customer has commented about this concern AND the PIE number is listed in the
Global Warranty Management / Investigate History link (GWM/IVH). If the customer has not commented about this
condition or the EI does not show in GWM/IVH, disregard the PIE and proceed with diagnostics found in published
service information. THIS IS NOT A RECALL refer to Service Bulletin 04-00-89-053 for more details on the use of
Engineering Information bulletins.
Brand:
Model:
Cadillac
Escalade Models
Chevrolet
Silverado 1500 New (RPO
J22, VIN Digit 5 = A / D)
Model Year:
VIN:
from
to
from
to
2022
2022
—
—
Engine:
Transmission:
Equipped with 3.0L
Engine (RPO LM2)
—
Suburban
Tahoe
GMC
Sierra 1500 New (RPO J22,
VIN Digit 5 = H / U)
Yukon models
Involved Region or Country
North America
Condition
The purpose of this investigation is to help GM engineering to better understand the conditions that causes
mechanical seal loss of the NOx sensors.
Technicians may find one or more of the following DTCs set:
table-item
•
P2A00 - O2S Circuit Range/Performance Bank 1 Sensor 1
•
P2A01 - Heated Oxygen Sensor 2 Performance
•
P2A02 - Heated Oxygen Sensor 3 Performance
•
P22FB - NOx Sensor 1 Performance - Sensing Element
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GM Engineering is attempting to determine the root cause of the above condition. Engineering has a need to
gather information on vehicles PRIOR to repair that may exhibit this condition. As a result, this information will be
used to "root cause" the customer's concern and develop/validate a field fix.
Cause
Correction
Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws applicable to the activities it performs under
this bulletin, including but not limited to handling, deploying, preparing, classifying, packaging, marking, labeling, and shipping dangerous goods. In the
event of a conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you must follow those applicable laws.
If you encounter a vehicle with the above concern, perform the following steps and contact the engineer listed below with your findings:
1.
Was the NOx sensor loose in the exhaust? If so, please take a picture.
2.
Is the tip of the NOx sensor damaged?
3.
Is there any damage to the exhaust pipe such as deformations, corrosion or abrasions?
4.
Does the sensor look like it was installed correctly and not tightened or cross threaded?
5.
Does the sensor have anti-seize paste on the threads of both, the original equipment and parts for service?
Note: If replacing a NOx sensor, please perform a NOx sensor reset in GDS.
6.
Take pictures and email them to [email protected]. for the following:
6.1.
That represent how far the sensor is loose in the exhaust.
6.2.
Showing the threads on the removed sensor.
6.3.
Showing the threads in the exhaust pipe.
Contact Information
The Contact Information has been redacted.
Please include the following information if leaving a message:
–
Technician name
–
Dealer name and phone number
–
Complete VIN and repair order (R.O) number
On the repair order, document the date and time the call was placed (even if the engineer was not reached).
If engineering is unable to return the call within one hour, proceed with diagnosis and repair based on information found in SI.
Warranty Information
If engineer was contacted or required information was provided, use:
Labor Operation
Description
Labor Time
4088728*
Engineering Information - Investigation to Better Understand the Conditions that
Cause Mechanical Seal Loss of NOx Sensors
0.4 Hrs
*This is a unique Labor Operation for bulletin use only.
Version
1
Modified
Released June 15, 2022
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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WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
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