Bulletin No.: PIP5927D

Service Bulletin

Date: February, 2026

PRELIMINARY INFORMATION
Subject:

Brand:

Diagnostic Tips: Possible DTC P0237 P0101 P1101 P0234 or P0299 Reduced
Engine Power
Model:

Model Year:
from

VIN:
to

from

Engine:

Transmission:

to

Chevrolet

Equinox

2023 - 2026

All

All

1.5 LSD

All

GMC

Terrain

2023 - 2026

All

All

1.5 LSD

All

Involved Region or Country

North America

Condition

DTC P0237 P0101 P1101 P0234 or P0299 reduced power

Cause

Please review the diagnostic tips

Correction
If you encounter one of the above vehicles that has reduced power with DTC P0237, P0101, P1101, P0234 or
P0299:
* If P0234 is found alone, please consider the following tips:
Was the turbocharger recently replaced for any other reason? Perform an "intake learned value reset" and reevaluate the concern.
If P0234 resets, check the wastegate actuator hose for any tears, leaks, or poor connections from the turbocharger
to the wastegate actuator itself as any leak on the hose network can create P0234.
If nothing found, swap the wastegate control solenoid and re-evaluate the concern.
If P0234 continues to reset check the wastegate actuator and/or wastegate lever for any travel binding and repair as
necessary
* If P0237 is found potentially combined with a P0101 and P1101, reviewing GDS on or after a hard acceleration test
may reveal the boost pressure sensor being pulled low below atmospheric pressure. This is indicative of a potentially collapsing CAC inlet hose. The large volume of air moving through the hose at high RPM and high boost may
"pull" the hose down into a collapsed state starving the engine of air. A hesitation or large lack of physical power
should be present at this time as well.
* If P0299 potentially combined with a P1101 presents, check the CAC inlet hose for a "ballooning" or "swelling"
condition as called out below.
Inspect the Charge Air Inlet Pipe at the Turbocharger to see if the anti-abrasion sleeve shows signs of being
shredded or split.
If this type of damage has been identified remove the Charge Air Inlet Hose assembly and inspect the Charge Air
hose beneath the abrasion sleeve for signs of being split.
This type of damage would allow the hose to swell under pressure damaging the abrasion sleeve and altering the
readings within the boost control system or create a potential air leak.

Copyright 2026 General Motors. All Rights Reserved.

Page 2

February, 2026

Bulletin No.: PIP5927D

* In either condition the hose may physically feel excessively "soft" and when squeezed may not return well to its
normal shape.
* Additionally, for P0299 inspect the hoses on both sides of the CAC for any hose pulled out of the crimp of the
connector or not fully seated.
* If P1101 is found ALONE, please do not consider this PI for repair resolution, perform standard diagnostics per SI.
*If P0299 is set by itself, review 25-NA-227 for fuel level concern or standard diagnostic using SI. Fuel level
percentage can be viewed in Freeze frame Failure records when the DTC sets.
Pictures below show damage to abrasion sleeve on Charge Air Inlet Hose.
#1

6371857

#2

Bulletin No.: PIP5927D

February, 2026

Page 3

6371858

#3 Picture below inside the circled area shows damage to inner hose beneath abrasion sleeve

6371859

Replace Charge Air Inlet Pipe assembly using latest parts listed in EPC.

Page 4

February, 2026

Version

5

Modified

06/13/2023 - Created on.
05/21/2024- Updated to include 2024 model year.
09/03/2024- Updated to include 2025 model year.
09/29/2025- Updated to include 2026 model year
02/26/2026- Updated diagnostic verbiage

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.

Bulletin No.: PIP5927D

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