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NHTSA ID Number: 10161941
Manufacturer Communication Number: 18NA246
Summary
This technical bulletin provides a procedure to change the oil if excessive fuel has been found in the oil and the cause of the DTC set. Also replacing the PCV valve in camshaft cover and updating the ECM with latest software.
44 Affected Products
Vehicles
MAKE | MODEL | YEAR |
BUICK | ENVISION | 2016-2019 |
BUICK | REGAL | 2014-2019 |
CADILLAC | ATS | 2013-2019 |
CADILLAC | CT6 | 2016-2018 |
CADILLAC | CTS | 2014-2019 |
CHEVROLET | CAMARO | 2016-2019 |
CHEVROLET | EQUINOX | 2018-2019 |
CHEVROLET | MALIBU | 2013-2019 |
CHEVROLET | TRAVERSE | 2018-2019 |
GMC | TERRAIN | 2017-2019 |
Parts
Filter, Oil | Refer to EPC | 1 |
Oil | ||
VALVE, PCV (Primary) | 55596783 | 1 |
SEOCONTENT-START
Bulletin No.: 18-NA-246
Date: June, 2019
Service Bulletin
TECHNICAL
Subject: Malfunction Indicator Lamp (MIL) Illuminated – DTC P0172 Set (North America Vehicles Only)
Attention: This Bulletin applies to the vehicles that have fuel enriched engine oil due to short driving intervals.
Brand: | Model: | Model Year: | VIN or Build Date: | Engine: | Transmission: | |||
from | to | from | to | |||||
Buick | Envision | 2016 | 2019 | SOP | May 7, 2019 And Engine Unique Number (EUN) before T119127XHXTX0251 | Equipped with 2.0L (LTG) | ||
Regal | 2014 | |||||||
Cadillac | ATS | 2013 | ||||||
CTS | 2014 | |||||||
Chevrolet | Camaro | 2016 | ||||||
Equinox | 2018 | |||||||
Malibu | 2013 | |||||||
Traverse | 2018 | |||||||
GMC | Terrain | 2018 |
Involved Region or Country | North America |
Condition | Some customers may comment that the MIL is illuminated.
Some technicians may find DTC P0172 (Fuel Trim System Rich) set in the Engine Control Module (ECM). |
Cause | This condition may be caused by driving the vehicle in short intervals, allowing excessive fuel to collect in the crankcase. |
Correction | Important: This service procedure is for vehicles that have fuel enriched engine oil due to frequent short trip operation. Replacing fuel components such as the high pressure fuel pump or fuel injectors will not correct the setting of P0172 under the operating conditions described unless those components can be verified as causing a fuel rich condition.
If fuel in the engine oil has been confirmed to be caused by frequent short trip operation, refer to the Service Procedure below. |
Service Procedure
Important: Perform all of the procedures below that apply to the model year of the vehicle being worked on. For 2019 Model Years:
5336568
Vehicles built after May 7, 2019 may already have the updated PCV installed. Inspect the Engine Julian Date by reviewing the EUN on the front engine cover.
For 2016-2018 Model Years:
Note: Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. Install a GM Authorized Programming Support Tool to maintain system voltage. Refer to www.gmdesolutions.com for
further information. If not available, connect a fully charged 12 V jumper or booster pack disconnected from the AC voltage supply. DO NOT connect a battery charger.
Program the ECM to the latest software available. Refer to K20 Engine Control Module: Programming And Setup in SI.
5336723
Example Engine Unit Number:
- The first digit reflects the engine plant (in this case T = Tonawanda).
- The second digit reflects the shift (in this case 1 = First Shift).
- The third and fourth digits reflect the calender year (in this case 18 = 2018).
- The fifth, sixth and seventh digits reflect the day of that calendar year (in this case 162 = 162nd day of 2018 calendar year (build date)). If the engine you are working on was built on or after Julian Date 19127 (May 7, 2019),
EUN# T119127 XHXTX0251, the PCV does not need to be replaced. The new revised PCV is already installed in the camshaft cover. Refer to SI for further diagnostics.
Engines built prior to Julian Date 19127 (May 7, 2019), EUN# T119127 XHXTX0251, have the old style primary PCV valve installed and will need to be replaced. Continue with service procedure below.
For 2016-2019 Model Years:
5207126
Note: The graphic above compares the old style primary PCV valve (A) to the new revised PCV valve (B).
- Remove the camshaft cover (3). Refer to Camshaft Cover Replacement in SI.
- Remove the old style PCV valve from the coverand discard.
- Apply a light coating of oil to the new revised PCV valve O-ring.
5207717
- Using hand pressure, install the new PCV valve into the cover until seated into bore.
- Install the camshaft cover.
2013-2019 Model Years:
Note: An oil and filter change is necessary to remove excessive fuel collected in the crankcase and correct the DTC set.
- Perform an oil change. Refer to Engine Oil and Oil Filter Replacement in SI.
- Clear the code and take the vehicle for a test driveto validate that the code does not return.
Important: If the customer continues to frequently operate the vehicle in this manner, they MUST change the engine oil and filter more frequently than the oil life monitor indicates. How often the customer must change the engine oil is based on how they operate the vehicle.
Parts Information
Causal Part | Description | Part Number | Qty |
N/A | Filter, Oil | Refer to EPC | 1 |
N/A | Oil | ||
N/A | VALVE, PCV (Primary) | 55596783 | 1 |
Warranty Information
Important: Only select the labor operation that coincides 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.
Labor Operation | Model | Description | Labor Time |
4086338* | All | Diagnose MIL and Clear Code | 0.2 hr |
Add | All | Oil and Filter Change | 0.3 hr |
Add | Envision | Camshaft Cover Removal and Install | 2.5 hrs |
Add | Regal | Camshaft Cover Removal and Install | 1.5 hrs |
Add | ATS | Camshaft Cover Removal and Install | 3.9 hrs |
Add | CTS | Camshaft Cover Removal and Install | 3.7 hrs |
Add | Camaro | Camshaft Cover Removal and Install | 3.9 hrs |
Add | Equinox | Camshaft Cover Removal and Install | 2.5 hrs |
Add | Malibu | Camshaft Cover Removal and Install | 3.6 hrs |
Add | Traverse | Camshaft Cover Removal and Install | 4.0 hrs |
Add | Terrain | Camshaft Cover Removal and Install | 2.5 hrs |
Add | All | Install Primary PCV Valve | 0.1 hr |
Labor Operation | Model | Description | Labor Time |
2886148* | All | Engine Control Module Reprogramming with SPS for DTC P0172 Set** (Applies to 16MY, 17MY and 18MY only) | 0.3 hr |
*This is a unique Labor Operation for Bulletin use only.
**To avoid warranty transaction rejections, the SPS Warranty Claim Code must be entered when submitting this transaction. When more than one Warranty Claim Code is generated for a control module programming event, it is required to document all Warranty Claim Codes in the Correction field on the Job Card. Dealers must only enter one code in the “SPS Warranty Claim Code” field on the transaction, otherwise the transaction will reject. |
Warranty Claim Code Information Retrieval
If the SPS Warranty Claim Code was not recorded on the Job Card, the code can be retrieved in the SPS system as follows:
- Open TIS on the computer used to program the vehicle.
- Select and start SPS.
- Select Settings.
- Select the Warranty Claim Code tab.
The VIN, Warranty Claim Code and Date/Time will be listed on a roster of recent programming events. If the code is retrievable, dealers should resubmit the transaction making sure to include the code in the SPS Warranty Claim Code field.
Version | 6 |
Modified | Released August 06, 2018
January 30, 2019 – Added an Attention statement, updated the Models section, Correction, Service Procedure and Parts and Warranty Information. February 14, 2019 – New Labor Operation number requested for ECM programming under Warranty Information section. March 19, 2019 – Updated the Envision, Equinox and Terrain Labor Times. March 28, 2019 – Added NEW and DISCARD to steps 2, 3 and 4 under For 2016-2019 Model Years: of the Service Procedure. May 29, 2019 – Added Build Date/EUN Breakpoint information to Models, added For 2019 Model Years section to the Service Procedure, added Model Year descriptions to the two Labor Operation Numbers, changed the Labor Time for Engine Control Module Reprogramming with SPS and added SPS Warranty Claim Code information. |
SEOCONTENT-END
Bulletin No.: 18-NA-246
Date: June, 2019
https://www.nhtsa.gov/recalls?nhtsaId=10161941
https://static.nhtsa.gov/odi/tsbs/2019/MC-10161941-9999.pdf
To View or Download this Document Click Here
Bulletin No.: 18-NA-246
Date: March, 2019
https://www.nhtsa.gov/recalls?nhtsaId=10158819
https://static.nhtsa.gov/odi/tsbs/2019/MC-10158819-9999.pdf
To View or Download this Document Click Here
Bulletin No.: 18-NA-246
Date: February, 2019
https://www.nhtsa.gov/recalls?nhtsaId=10158772
https://static.nhtsa.gov/odi/tsbs/2019/MC-10158772-9999.pdf
To View or Download this Document Click Here
Bulletin No.: 18-NA-246
Date: February, 2019
https://www.nhtsa.gov/recalls?nhtsaId=10158160
https://static.nhtsa.gov/odi/tsbs/2019/MC-10158160-9999.pdf
To View or Download this Document Click Here
Bulletin No.: 18-NA-246
Date: February, 2019
https://www.nhtsa.gov/recalls?nhtsaId=10156896
https://static.nhtsa.gov/odi/tsbs/2019/MC-10156896-9999.pdf
To View or Download this Document Click Here
Bulletin No.: 18-NA-246
Date: February, 2019
https://www.nhtsa.gov/recalls?nhtsaId=10155584
https://static.nhtsa.gov/odi/tsbs/2019/MC-10155584-9999.pdf
To View or Download this Document Click Here
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