NHTSA ID Number: 10137286
Manufacturer Communication Number: 16NA405
TSB/Document Date: 2018-05-21
Summary
This technical bulletin provides a procedure to install a PCV heater and a front fascia blocker to correct the turbo charger system from freezing causing cold weather performance issues.
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TSB/Document ID: 16NA405
Replacement Service Bulletin Number:
MFR Communication Date: 2018-02-02
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
File in Section:
Bulletin No.:
Service Bulletin
Date:
16-NA-405
February, 2018
TECHNICAL
Subject:
Poor Engine Performance in Extremely Cold Weather Conditions, PCV Bypass Hose
and Charge Air Cooler Icing for LUV Engines, Malfunction Indicator Lamp (MIL)
Illuminated - DTC P0299, P0236, P2227, P00C7 Set
Attention: For vehicles that are out of warranty and are identified on the Applicable Warranties
section in the GM Global Warranty Management system, refer to Special Coverage
#17157.
Brand:
Model:
Encore
Trax
Model Year:
VIN:
from
to
2013
2018
from
Engine:
to
1.4L (LUV)
Involved Region or Country
North America
Condition
Some customers may comment that when driving short distances and/or slow speed
driving cycles, their vehicle experiences one or several of the following conditions within
the first 10 to 15 minutes of vehicle operation in extremely cold weather conditions (-18°C
or less / 0°F or less):
• Loss of power.
• Smoke out the tail pipe.
• Hesitation on acceleration.
• Stalling condition.
• Burning oil odor possibly caused by oil leak.
• May also notice a Malfunction Indicator Lamp illuminated.
• After driving for a period of time, the driveability issues seem to diminish.
• Malfunction Indicator Light Illuminated.
This condition may also cause an increase in crankcase pressure, creating oil leaks at
seals and gaskets.
The technician may find one or more of the following DTCs set:
• P0299
• P0236
• P2227
• P00C7
Cause
Correction
Copyright 2018 General Motors
LLC. All Rights Reserved.
This condition may be caused by one or more of the following:
• Plugged crank case vent tube from ice forming in the tube during very cold weather
conditions.
• Ice accumulation in the charge air cooler restricting air flow to the throttle body.
Important: The PCV heater parts are only to be used in northern states or provinces that
temperatures are -18°C or less / 0°F or less and for critical customers only.
If any of the following conditions are validated to be caused by freezing/icing, installation
of the following components are necessary:
• Heated PCV Bypass system
• Modified Charge Air Cooler (CAC)
If not previously performed, an oil change may be necessary to remove any moisture
from the engine. Prior to the oil change, run the engine at idle for an extended period of
time to melt any ice in the engine.
Page 2
February, 2018
Bulletin No.: 16-NA-405
Important: If a fascia blocker was installed on the
vehicle, it must be removed and discarded. A new
fascia blocker will no longer need to be installed on
the vehicle.
PCV Heater Service Procedure
Notice: The PCV Heater may have been installed
previously onto the vehicle. If the PCV heater has been
installed, proceed to step 36.
1. Operate the vehicle until it reaches operating
temperature.
2. Remove the battery. Refer to Battery Replacement
in SI.
3. Remove the engine cover.
2773935
4. Remove and discard the air cleaner outlet duct (2)
and resonator assembly.
Caution: DO NOT remove the vacuum hose from the
vehicle unless the vacuum hose shows apparent signs
of damage. Part damage may occur when attempting to
disconnect the vacuum hose.
Bulletin No.: 16-NA-405
February, 2018
Page 3
4855374
5. Using care, cut and remove the tape that secures
the vacuum line to the Positive Crankcase
Ventilation (PCV) Hose/Pipe/Tube.
2191937
Note: Original PCV pipe with vacuum line attached
removed from vehicle for illustrative purposes ONLY.
6. Remove and discard the PCV Hose/Pipe/Tube (1)
leaving the vacuum line. Refer to Positive
Crankcase Ventilation Hose/Pipe/Tube
Replacement in SI.
Page 4
February, 2018
Bulletin No.: 16-NA-405
4910635
7. Remove the Intake Air Pressure and Temperature
sensor (IAPT) (2). Refer to Intake Air Pressure and
Temperature Sensor Replacement in SI.
4377828
4910683
8. Inspect, clean and dry the IAPT sensor of any
contaminates.
9. Install the IAPT sensor.
10. Install the block off plug (1) onto the turbocharger
bypass port (2).
Bulletin No.: 16-NA-405
February, 2018
4855375
11. Using a tie strap, secure the vacuum line to the
engine wiring harness.
4418077
12. Install the new air cleaner outlet duct (1) and air
resonator (3) assembly.
13. Using care, cut and remove the tape securing the
vacuum line to the NEW PCV pipe.
14. Remove the vacuum line from the PCV pipe
assembly.
15. Install the new PCV pipe assembly.
16. Install the PCV heater into air cleaner outlet
duct (2).
Page 5
4855376
17. Using Woven Polyester Electrical Tape (PET),
secure the vacuum line to the PCV pipe.
Page 6
February, 2018
Bulletin No.: 16-NA-405
2760835
18. Remove the fuse block cover (1).
19. Remove the nut (4) that secures the upper fuse
block to the body.
20. Loosen the three upper connector bolts (2).
21. Separate the upper (5) fuse block assembly from
the fuse block base (8) by releasing the snap
locks. Refer to Front Compartment Fuse Block
Replacement in SI.
22. Route the PCV wiring harness under the
battery tray.
4377876
23. For 2013-2016 model vehicles:
23.1. Remove UEX_X2 connector from the fuse
block base.
23.2. Remove connector cover.
Bulletin No.: 16-NA-405
February, 2018
Page 7
23.3. Install PCV heater wiring harness terminal
(1) into the J11 cavity (2).
⇒ Refer to X50A Fuse Block - Underhood X2 (Doc ID
4752878) in SI.
23.4. Route the wiring harness between the
battery and fuse block.
4379861
27. Position and snap the upper fuse block onto
the base.
Tighten
4598974
24. For 2017-2018 model vehicles:
24.1. Remove the UEX_X3 connector from the
fuse block base.
24.2. Remove the connector cover.
24.3. Remove connector lock (1).
24.4. Install PCV heater wiring harness terminal
into the H6 cavity (2).
⇒ Refer to X50A Fuse Block - Underhood X3 (Doc ID
4752879) in SI.
25. Using tie straps, fasten the PCV wiring harness to
the connectors wiring harness at the white tape
indicators.
26. Install the connector back onto the fuse
block base.
Important: Only replace the fuse and install the labels
on vehicles that have a 5 amp fuse. Some vehicles
have the 10 amp fuse already installed and do not
require replacement or the label.
Torque the bolts (1) to specifications. Refer to
Fastener Specifications in SI.
28. If necessary, replace the 5 amp fuse with a 10 amp
fuse into cavity F17 (2).
29. Install the front compartment fuse block cover.
4605957
30. Install the PCV heater wiring harness ground wire
(2) to ground G103 (1).
Page 8
February, 2018
Bulletin No.: 16-NA-405
4379843
31. If necessary, install the UEC sticker onto the
backside of the fuse block cover and in the owners
manual under Engine Compartment Fuse Block.
4609442
32. Route the PCV heater wiring harness across the
engine wiring harness.
33. Using the tie straps, fasten the wiring harness at
the white marking points (1).
34. Connect the electrical connector (3) to the PCV
heater (2).
35. Install the battery.
36. Install engine cover.
Bulletin No.: 16-NA-405
February, 2018
Page 9
Important: Do Not perform an oil change if the
vehicle is returning for the CAC update and/or if the oil
change was recently done.
• If the oil change was recently done, proceed
to step 38.
• If the oil change was not previously done,
proceed with procedure.
37. If required, perform an oil change. Refer to Engine
Oil and Oil Filter Replacement in SI.
4639714
Important: If a fascia blocker was installed (1, 2) on
the vehicle, it must be removed and discarded. A new
fascia blocker will no longer need to be installed on
the vehicle.
Page 10
February, 2018
Bulletin No.: 16-NA-405
2851444
38. If installed, remove and discard the fascia blocker.
39. Remove the CAC (2). Refer to Charge Air Cooler
Replacement in SI.
40. Install modified CAC.
Parts Information
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
Description
Model Year
Part
Number
Kit, PCV
Heater
25198125
1
4081358*
PCV Heater, Wiring Harness
Installation and IAPT
Inspection
1.2 hr
2013-2016
Kit, PCV
Heater
2017-2018
25198126
1
Add
Charge Air Cooler Removal
1.0 hr
2013-2018
(Encore,
Trax)
42574031
(VIN pos 1
= K)
Add
Fascia Blocker Removal
0.2 hr
1
Add
Oil Change
0.3 hr
20132018 (Trax)
42582747
(VIN pos 1
= 3)
1
Cooler,
Charge Air
2013-2018
Qty
*This is a unique Labor Operation for Bulletin use only.
Refer to the Electronic Parts
Catalog (EPC).
Bulletin No.: 16-NA-405
February, 2018
Page 11
Version
7
Modified
December 23, 2016 - Added DTCs to the Condition and a Note to the Parts Information.
January 5, 2017 - Removed Fascia Blocker information.
January 18, 2017 - Added draining the CAC.
September 7, 2017 - Added fascia blocker removal information and added CAC part
numbers.
December 5, 2017 - Added RPO LUV to Subject, added the 2018 Model Year, modified
the Attention statement and added IAPT sensor information.
February 2, 2018 - Removed thaw CAC information and added connector pinout
reference.
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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