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NHTSA ID Number: 10161925
Manufacturer Communication Number: 19NA114
Summary
This informational bulletin provides information to the tech to test the PCV for proper performance before replacing the camshaft cover to correct a MIL On w/DTC P0171.
36 Affected Products
Vehicles
MAKE | MODEL | YEAR |
BUICK | ENCORE | 2013-2019 |
CADILLAC | ELR | 2014-2017 |
CHEVROLET | CRUZE | 2011-2016 |
CHEVROLET | SONIC | 2012-2019 |
CHEVROLET | TRAX | 2013-2019 |
CHEVROLET | VOLT | 2012-2015 |
Condition
MIL is illuminated.
DTC P0171 (Fuel Trim System Lean) or other airflow related codes set in the Engine Control Module (ECM).
Cause
This condition may be caused by a torn positive crankcase ventilation (PCV) Crankcase Pressure Control Diaphragm.
⇒ The PCV crankcase pressure control diaphragm in the PCV valve could be torn, allowing un-metered air to enter the crankcase.
Information
Following the diagnostics in SI for that DTC may lead to the PCV system as a potential source of external airflow.
Confirmation of the PCV valve performance must be done before replacing the camshaft cover.
1 Associated Document
Manufacturer Communications
Bulletin No.: 19-NA-114
Date: May, 2019
https://www.nhtsa.gov/recalls?nhtsaId=10161925
NHTSA ID Number: 10161902
Manufacturer Communication Number: 19NA114
Summary
This informational bulletin provides information to the tech to test the PCV for proper performance before replacing the camshaft cover to correct a MIL On w/DTC P0171.
1 Associated Document
Manufacturer Communications
Bulletin No.: 19-NA-114
Date: May, 2019
https://www.nhtsa.gov/recalls?nhtsaId=10161902
NHTSA ID Number: 10149063
Manufacturer Communication Number: PIP5197J
Summary
This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that have excessive oil consumption, blue smoke from the exhaust, or a Malfunction Indicator Lamp. Technician should inspect the PVC orifice for leaking oil or drawing a vacuum at idle. If the PCV orifice external port is leaking oil or vacuum, replace the camshaft cover assembly. Technician will inspect for a missing intake manifold Non Return Valve that may have damaged the PCV orifice diaphragm. Check for the return valve if it is not visible use a long cotton swab to wipe any excess oil from the valve to validate. If the non return valve is still not visible, then intake manifold removal for inspection is required to validate. When the valve is present reinstall the intake manifold. When the valve is not present replace the intake manifold assembly.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5197J
Published date: 10/30/2018
https://www.nhtsa.gov/recalls?nhtsaId=10149063
MC-10149063-9999.pdf 2882.673KB
NHTSA ID Number: 10147383
Manufacturer Communication Number: PIP5197H
Summary
This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that have excessive oil consumption, blue smoke from the exhaust, or a Malfunction Indicator Lamp. Technician should inspect the PVC orifice for leaking oil or drawing a vacuum at idle. If the PCV orifice external port is leaking oil or vacuum, replace the camshaft cover assembly. Technician will inspect for a missing intake manifold Non Return Valve that may have damaged the PCV orifice diaphragm. Check for the return valve if it is not visible use a long cotton swab to wipe any excess oil from the valve to validate. If the non return valve is still not visible, then intake manifold removal for inspection is required to validate. When the valve is present reinstall the intake manifold. When the valve is not present replace the intake manifold assembly.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5197H
Published date: N/A
https://www.nhtsa.gov/recalls?nhtsaId=10147383
MC-10147383-9999.pdf 2882.651KB
NHTSA ID Number: 10137185
Manufacturer Communication Number: PIP5197G
Summary
This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that have excessive oil consumption, blue smoke from the exhaust, or a Malfunction Indicator Lamp. Technician should inspect the PVC orifice for leaking oil or drawing a vacuum at idle. If the PCV orifice external port is leaking oil or vacuum, replace the camshaft cover assembly. Technician will inspect for a missing intake manifold Non Return Valve that may have damaged the PCV orifice diaphragm. Check for the return valve if it is not visible use a long cotton swab to wipe any excess oil from the valve to validate. If the non return valve is still not visible, then intake manifold removal for inspection is required to validate. When the valve is present reinstall the intake manifold. When the valve is not present replace the intake manifold assembly.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5197G
Published date: 03/13/2018
https://www.nhtsa.gov/recalls?nhtsaId=10137185
NHTSA ID Number: 10113857
Manufacturer Communication Number: PIP5197E
Summary
This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that have excessive oil consumption, blue smoke from the exhaust, or a Malfunction Indicator Lamp. Technician should inspect the PVC orifice for leaking oil or drawing a vacuum at idle. If the PCV orifice external port is leaking oil or vacuum, replace the camshaft cover assembly. Technician will inspect for a missing intake manifold Non Return Valve that may have damaged the PCV orifice diaphragm. Check for the return valve if it is not visible use a long cotton swab to wipe any excess oil from the valve to validate. If the non return valve is still not visible, then intake manifold removal for inspection is required to validate. When the valve is present reinstall the intake manifold. When the valve is not present replace the intake manifold assembly.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5197E
Published date: 04/4/2017
https://www.nhtsa.gov/recalls?nhtsaId=10113857
MC-10113857-9999.pdf 548.906KB
NHTSA ID Number: 10114424
Manufacturer Communication Number: PIP5197B
Summary
This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that have excessive oil consumption, blue smoke from the exhaust, or a Malfunction Indicator Lamp. Technician should inspect the PVC orifice for leaking oil or drawing a vacuum at idle. If the PCV orifice external port is leaking oil or vacuum, replace the camshaft cover assembly. Technician will inspect for a missing intake manifold Non Return Valve that may have damaged the PCV orifice diaphragm. Check for the return valve if it is not visible use a long cotton swab to wipe any excess oil from the valve to validate. If the non return valve is still not visible, then intake manifold removal for inspection is required to validate. When the valve is present reinstall the intake manifold. When the valve is not present replace the intake manifold assembly.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5197B
Date: Feb-2015
https://www.nhtsa.gov/recalls?nhtsaId=10114424
MC-10114424-9999.pdf 1155.486KB
NHTSA ID Number: 10114390
Manufacturer Communication Number: PIP5197A
Summary
This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that have excessive oil consumption, blue smoke from the exhaust, or a Malfunction Indicator Lamp. Technician should inspect the PVC orifice for leaking oil or drawing a vacuum at idle. If the PCV orifice external port is leaking oil or vacuum, replace the camshaft cover assembly. Technician will inspect for a missing intake manifold Non Return Valve that may have damaged the PCV orifice diaphragm. Check for the return valve if it is not visible use a long cotton swab to wipe any excess oil from the valve to validate. If the non return valve is still not visible, then intake manifold removal for inspection is required to validate. When the valve is present reinstall the intake manifold. When the valve is not present replace the intake manifold assembly.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5197A
Date: Feb-2015
https://www.nhtsa.gov/recalls?nhtsaId=10114390
MC-10114390-9999.pdf 1155.973KB
NHTSA ID Number: 10112056
Manufacturer Communication Number: PIP5197
Summary
This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that have excessive oil consumption, blue smoke from the exhaust, or a Malfunction Indicator Lamp. Technician should inspect the PVC orifice for leaking oil or drawing a vacuum at idle. If the PCV orifice external port is leaking oil or vacuum, replace the camshaft cover assembly. Technician will inspect for a missing intake manifold Non Return Valve that may have damaged the PCV orifice diaphragm. Check for the return valve if it is not visible use a long cotton swab to wipe any excess oil from the valve to validate. If the non return valve is still not visible, then intake manifold removal for inspection is required to validate. When the valve is present reinstall the intake manifold. When the valve is not present replace the intake manifold assembly.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5197
Date: May-2014
https://www.nhtsa.gov/recalls?nhtsaId=10112056
MC-10112056-9999.pdf 1385.25KB
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SEOCONTENT-START
Copyright 2019 General Motors LLC. All Rights Reserved. Service Bulletin Bulletin No.: 19-NA-114 Date: May, 2019 INFORMATION Subject: Information on Malfunction Indicator Lamp (MIL) Illuminated – DTC P0171 Set This Bulletin replaces PIP5197M. Please discard PIP5197M. Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Buick Encore 2013 2019 1.4L (LUJ, LUU, LUV) Cadillac ELR 2014 2017 Chevrolet Cruze 2011 2016 Sonic 2012 2019 Trax 2013 2019 Volt 2012 2015 Involved Region or Country North America Condition Some customers may comment that the MIL is illuminated. Some technicians may find DTC P0171 (Fuel Trim System Lean) or other airflow related codes set in the Engine Control Module (ECM). Cause This condition may be caused by a torn positive crankcase ventilation (PCV) Crankcase Pressure Control Diaphragm. ⇒ The PCV crankcase pressure control diaphragm in the PCV valve could be torn, allowing un-metered air to enter the crankcase. Information Following the diagnostics in SI for that DTC may lead to the PCV system as a potential source of external airflow. Confirmation of the PCV valve performance must be done before replacing the camshaft cover. Page 2 May, 2019 Bulletin No.: 19-NA-114 Service Procedure 5335015 Test to confirm a tear in the PCV valve: 1. Remove the engine cover. Refer to Engine Cover Replacement in SI. 2. Verify that the engine oil dipstick is fully seated, and the oil fill cap is fully tightened. 3. With the engine running, listen for noise coming from the PCV valve. ⇒ If noise is heard, check to see if the noise gets quieter or disappears with the engine oil dipstick removed. 4. Reinsert the dipstick. Note: Normal operation of the PCV crankcase pressure control diaphragm could cause a tissue to flutter against the port (smoke would not be continuously drawn into the port). A torn crankcase pressure control diaphragm would cause the tissue to be held against the port (smoke would be continuously drawn in) due to internal engine vacuum leaking through the diaphragm. 5. Check to see if there is vacuum at the PCV vent at the front of the PCV valve by placing a piece of tissue near it. ⇒ The tissue will be sucked against the vent and held if vacuum is present. Smoke can also be used to see if it is drawing into the PCV vent port. • If the PCV valve is making noise and there is vacuum present at the PCV valve vent, replace the camshaft cover. Refer to Camshaft Cover Replacement in SI. • If the PCV valve does NOT make noise or leak vacuum, the PCV system is not the cause and further diagnostics using SI would be needed. 6. Reinstall the engine cover. Refer to Engine Cover Replacement in SI. Version 1 Modified Released May 15, 2019
SEOCONTENT-END
Is there a similar problem on 2012 sonics with the 1.4l? The PCV valve is leaking and the non-return valve is not visible upon inspection. Can these repair procedures be applied to my sonic?
What if I already had this replaced before and the problem showed up a year and a half later?