PIP5841J Service Bulletin/Repair Instructions

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:
Transmission:
Buick
Envision
2023-2025
All
All
2.0 LSY
All
Cadillac
CT4
2023-2025
All
All
2.0 LSY
All
Cadillac
CT5
2023-2025
All
All
2.0 LSY
All
Cadillac
XT4
2023-2025
All
All
2.0 LSY
All
Cadillac
XT5
2023 - 2025
All
All
2.0 LSY
All
Cadillac
XT6
2023 - 2025
All
All
2.0 LSY
All
Chevrolet
Blazer
2023 - 2025
All
All
2.0 LSY
All
GMC
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.
WE SUPPORT VOLUNTARY

TECHNICIAN

CERTIFICATION

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