NHTSA ID Number: 11028856
Manufacturer Communication Number: PIP5841J
TSB/Document Date: 2026-02-18
Summary
This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.
Bulletin No.: PIP5841J
Service Bulletin
Date: February, 2026
PRELIMINARY INFORMATION
Subject:
Brand:
Diagnostic Tip: DTC P04FB Due To Possible Condensation Freezing In
Crankcase Pressure Sensor Assembly
Model:
Model Year:
from
VIN:
to
from
to
Engine:
Envision
2023-2025
All
All
2.0 LSY
All
CT4
2023-2025
All
All
2.0 LSY
All
CT5
2023-2025
All
All
2.0 LSY
All
XT4
2023-2025
All
All
2.0 LSY
All
XT5
2023 - 2025
All
All
2.0 LSY
All
XT6
2023 - 2025
All
All
2.0 LSY
All
Blazer
2023 - 2025
All
All
2.0 LSY
All
Acadia
2023 - 2023
All
All
2.0 LSY
All
Involved Region or Country
North America
Condition
DTC P04FB Failed current or history
Cause
Possible moisture or condensation freezing in Crankcase Pressure Sensor assembly
Correction
If you encounter a vehicle setting DTC P04FB in temperatures below freezing that has failed current or history
complete the published SI diagnostics for the DTC.
If unable to establish a root cause:
Remove the PCV/Crankcase Pressure Sensor and hose assembly and inspect for presence of frozen moisture/
condensation in the Crankcase Pressure sensor and hose assembly.
If frozen moisture is present, please allow the Crankcase pressure sensor and hose assembly to thaw out and the
moisture to drain completely.
Use a combination of light compressed air and a shop towel to remove any residual condensation/moisture.
Do not replace the Crankcase Pressure sensor.
Note: If the ambient air temperatures have not been below freezing but moisture is still present in the Crankcase
pressure sensor. Remove the moisture using a combination of light compressed air and a shop towel.
Note: If this condition returns replace the Crankcase pressure sensor using the latest parts available in EPC.
Additional information is currently being reviewed for MY 2019-2022.
This PI will become a Service Bulletin once additional information becomes available.
Once completed clear any remaining DTC's using GDS and evaluate.
Copyright 2026 General Motors
. All Rights Reserved.
Page 2
February, 2026
Bulletin No.: PIP5841J
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
*4088908
PCV/Crankcase Pressure
Sensor and Hose
Assembly Clean and Drain
.3 Hr.
*This is a unique Labor Operation for Bulletin use only.
Version
12
Modified
02/23/2022 - Created on.
05/11/2022 - Updated correction.
01/27/2023 - Updated to include 2023 Model Year.
03/15/2023 - Updated to include unique labor operation
01/05/2024 - Updated information to include 2024 Model Year.
02/27/2025 - Updated information to include 2025 Model Year
04/16/2025 - Updated Models.
12/17/2025 - Updated Models.
12/23/2026 - Reverted version
01/09/2026 - Added note regarding 2019-22MY vehicle repair currently being reviewed
02/04/2026 - Updated warranty statement
02/06/2026 - Updated model list.
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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TSB/Document ID: PIP5841J
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-12
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: UNKNOWN OR OTHER
MFR Component System:
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