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, P0234, P0236, P2261, P2227, P00C7 Set – 2011-2020 Buick Chevrolet Opel Vauxhall

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Copyright 2022 General Motors LLC. All Rights Reserved. Service Bulletin Bulletin No.: 22-NA-067 Date: September, 2022 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, P0234, P0236, P2261, P2227, P00C7 Set Brand: Model: Model Year: VIN Breakpoint: Engine: Transmission: from to from to Buick Encore 2013 2020 — 1.4L (RPO LUV) — Chevrolet Cruze 2011 2016 Sonic 2012 2020 Trax 2013 2020 Opel Ampera 2012 2015 Vauxhall Ampera 2012 2015 Involved Region or Country North America, Europe Condition Some customers may comment that when driving their vehicle, they may experience one or several of the following conditions: • Loss of power. • Smoke out the tail pipe. • Hesitation on acceleration. • Stalling condition. • Burning oil odor possibly caused by oil leak. • After driving for a period of time, the driveability issues seem to diminish. • Malfunction Indicator Lamp (MIL) Illuminated. This condition may also cause an increase in crankcase pressure, creating oil leaks at seals and gaskets. Technicians may find one or more of the following DTCs set: • P0299 • P0234 • P0236 • P2227 • P2261 • P00C7 Cause 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 accumulating in the intake manifold forming and blocking the PCV passage in the cylinder head. • Ice accumulation in the charge air cooler, restricting air flow to the throttle body. • Contamination (ice /water/oil/sludge) at the charge air bypass valve. Correction If contamination (Ice/water /oil/sludge) at charge air bypass valve is found: • Clean the charge air bypass valve. • Replace the intake manifold. • Replace the charge air bypass valve only if necessary. Page 2 September, 2022 Bulletin No.: 22-NA-067 Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws applicable to the activities it performs under this bulletin, including but not limited to handling, deploying, preparing, classifying, packaging, marking, labeling, and shipping dangerous goods. In the event of a conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you must follow those applicable laws. Turbocharger, Intake Manifold and Cylinder Head Inspection 5590615 1. Inspect the charge air bypass valve for ice/oil/ water/sludge build-up in the vacuum side port. 5590616 • If there is oil/water build-up in the valve port, disassemble and clean the components. Refer to Charge Air Bypass Valve Replacement in SI. • Only if necessary, replace the components. ⇒ Desired boost pressure vs actual boost pressure not within limits and no trouble found on waste gate actuator or No excessive play/no damage from turbocharger – Then Do Not replace turbocharger. Clean charge air bypass valve and replace the intake manifold. 2. Remove the intake manifold. Refer to Intake Manifold Replacement in SI. 5286434 3. Inspect the vacuum ports of the intake manifold for ice/water/oil accumulation. Bulletin No.: 22-NA-067 September, 2022 Page 3 5286457 4. Inspect the PCV intake runner for ice build-up blocking the cylinder head as shown above. 5286568 5. Clean any ice/sludge/water/carbon out of the cylinder head, cam cover and PCV pipes. If above condition exists, then replace the intake manifold. Refer to Intake Manifold Replacement in SI. Intake Manifold Redesign Inspection and Familiarization New intake manifold with a re-designed intake positive pressure port location. Solenoid location is electrical connector forward. The vacuum feed is in the same location. If the solenoid is found to be loose, review the location of the electrical connector. If the connector is facing the head of the assembly, it is installed backwards and will need to be removed and installed correctly. 6145032 Old Design Intake Manifold • Bypass Valve Vacuum (1) • Intake Positive Pressure Port (2) • Solenoid/Electrical Connector (3) Page 4 September, 2022 Bulletin No.: 22-NA-067 Note: The electrical receptacle location. Remove and re-install the lines and solenoid as they are retained to the intake if installed incorrectly. Tabs reversed, the solenoid is keyed and will not be seated in retainers. 6145033 New Design Intake Manifold • Bypass Valve Vacuum (1) • Intake Positive Pressure Port (2) • Solenoid/Electrical Connector (3) 6145028 New Design Intake with incorrect solenoid installation. 6145030 New Design Intake with solenoid retainers not seated and the electrical connector facing the cylinder head. Keyed section of intake not level with solenoid body. Parts Information Causal Part Description Part Number Qty N/A MANIFOLD, INT 28289977 1 N/A VLV, CHRG AIR BYPASS 55590593 1 Bulletin No.: 22-NA-067 September, 2022 Page 5 Warranty Information Note: Only select the Labor Operation that corresponds with the repair performed. 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. Note: Warranty Coverage Code E applies to Labor Operation 4088558. Labor Operation Description Vehicle Labor Time 4088558* Inspection and Cleaning All 0.3 hr Add Intake Manifold Inspection, Cleaning and Replacement Encore 1.0 hr Add Cruze 1.4 hrs Add Sonic 1.5 hrs Add Trax 1.0 hr Add Ampera 0.8 hr Add Charge Air Bypass Valve Cleaning or Replacement All 1.3 hrs *This is a unique Labor Operation for bulletin use only. Version 2 Modified Released August 08, 2022 Revised August 31, 2022 – Updated the first statement in Condition section, added Intake Manifold Redesign Inspection and Familiarization section and removed ELR and Volt vehicles from Warranty Information. 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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