18-NA-171

Bulletin No.:
Service Bulletin
Date:
18-NA-171
December, 2022
TECHNICAL
Subject:
Malfunction Indicator Lamp (MIL) Illuminated with DTC P0300
This bulletin replaces PIP5490D. Please discard PIP5490D.
Brand:
Model:
Buick
Encore
Chevrolet
Holden
Cruze
Model Year:
from
2016
VIN:
to
from
to
—
—
Engine:
Transmission:
1.4L (LE2)
—
2019
Trax
2018
Astra-K
Hatch HB5
2017
2017
Astra-K
Hatch HB5
and Wagon
2018
2020
Astra
Sedan NB4
2017
2018
Involved Region or Country
North America, Brazil, Chile, Colombia, Israel, Australia/New Zealand
Condition
Some customers may comment on a rough running engine with the Malfunction Indicator
Lamp (MIL) Illuminated.
Upon inspection, a technician may find DTC P0300 (Engine Misfire Detected) set in the
Engine Control Module (ECM) along with a misfire and low compression in one or more
cylinders.
Cause
This condition may be caused by a damaged piston requiring replacement.
Correction
Repair the engine mechanical concern based on the results of the Service Procedure
below.
Service Procedure
Perform an engine compression test. Refer to Engine
Compression Test in SI.
• If low compression is found, perform a cylinder
leakage test. Refer to Cylinder Leakage Test in SI
and record the test results to isolate the concern.
Note: To isolate the source of cylinder leakage to a
valve or cylinder sealing issue, it may be necessary to
remove the intake and exhaust manifolds.
•
If excessive leakage to the crankcase is isolated,
check all four cylinder walls for damage. If the
cylinder wall surfaces have not been damaged,
replace all four pistons and fill the crankcase with
current specification Dexos oil. Refer to Service
Bulletin 16-NA-367.
Copyright 2022 General Motors LLC. All Rights Reserved.
An un-metered air leak in the induction system, or an
engine mechanical issue causing rough running, may
cause the ECM to learn an incorrect Throttle Body Idle
Airflow Compensation value over time. This incorrectly
learned value may cause various symptoms to occur
such as MIL on with P1101 setting, rough or unstable
idle speeds and/or engine stall.
Once the mechanical repairs have been completed,
perform a throttle body inspection and cleaning. Refer
to Throttle Body Inspection and Cleaning in SI, followed
by Throttle Body Idle Air Flow Compensation Reset
function in GDS2.
Note: For the Cruze vehicles only – A calibration has
been released that will help to reduce the possibility of
a cracked piston. Update the engine control module to
the latest calibration available.
Page 2
December, 2022
Parts Information
Note: The piston and rod assembly referenced in this
bulletin arrives with rod bolts that are allowed to be
removed and reused one time for final assembly to the
complete repair.
Causal
Part
X
N/A
Causal
Part
Bulletin No.: 18-NA-171
Description
Part
Number
Qty
Gasket, O/Pump
12644558
1
Gasket, O/Pump
12644557
1
Bolt, Eng Mt
11610904
3
Bolt, Eng Mt
11547918
2
Description
Part
Number
Qty
BOLT, ENG MT
11588755
3
Piston, Kit
12705612
4
Bolt, Cr/Shf Balr
11611070
1
Rings, Piston
55588455
4
Rod Asm-Conn
12688858
4
Seal, Turbo Cool
Rtn Pipe
12662185
4
Bearing Kit,
Con Rod
12674806
4
Washer, Turbo Oil
Feed Pipe
12662184
2
Gasket Kit, Cyl
Head (inc bolts)
12709179
1
Gasket, Turbo Oil
Rtn Pipe
12640468
1
Filter, Oil
12706595
1
BOLT, F/INJR
55570735
8
Seal, Cr/Shf
Frt Oil
12661527
1
GASKET, EXH
SYS FRT
23238284
1
Seal Kit, F/Injrn
Fuel Rl
12659782
1
GASKET, EXH
SYS INTER
13453263
1
GASKET, TMG
CHAIN TENSR
12636523
1
GASKET, TURBO
OIL RTN PIPE
12653753
1 (AS
REQUIRED)
Nut, Turbo
11546365
4
Oil
As Required
Gasket,
Ctltc Conv
Refer to 16NA-367
12641115
1
Shield, Turbo Ht
12673929
1
Warranty Information
Pipe, Fuel Feed
Inter
12684046
1
Pan, Lwr Oil
12637773
1
For vehicles repaired under warranty, use the
appropriate labor operation associated with the repair
performed.
N/A
Version
9
Modified
Released May 22, 2018
Revised August 06, 2018 – Added the Encore model and Parts Information section.
Revised February 19, 2019 – Added a Note to the Parts Information section.
Revised July 09, 2019 – Added the Trax model, Parts Information and Additional
Keywords.
Revised August 20, 2019 – Added the 2019 Model Year, updated the Involved Region or
Country section and updated the Parts Information table.
Revised July 08, 2020 – Added Bolt, F/Injr P/N 55570735 to the Parts Information table.
Revised February 05, 2021 – Removed Transmission RPO, updated Involved Region or
Country section and replaced Gasket Kit P/N 12687228 with P/N 12709179 and Oil Filter
P/N 12696048 with P/N 12706595.
Revised April 13, 2021 – Added Holden models and Australia/New Zealand to Involved
Region or Country section.
Revised December 01, 2022 – Updated the Parts Information section.
Additional SI Keywords: P0301, P0302, P0303, P0304
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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