# P0171 on the 2014 Buick Encore

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P0171

- [10178406](https://open.wenmarpro.com/bulletins/10178406), 2020-08-10: Special Coverage \- Certain 2014 model year Buick Encore, 2011 \- 2014 model year Chevrolet Cruze, 2012 \- 2014 model year Chevrolet Sonic, and 2014 model year Chevrolet TRAX vehicles, equipped with a 1.4L Engine \(RPO LUJ or LUV\), may have a condition where cracks can develop in the diaphragm of the Positive Crankcase Ventilation \(PCV\) pressure regulator valve. This valve is a part of the engine camshaft cover. If this were to occur, excess air could be drawn into the engine intake. As a result, the engine may run rough, especially during idle, the Malfunction Indicator Light \(Check Engine Light\) would illuminate and a diagnostic trouble code for Fuel Trim Lean \(P0171\) or other airflow related DTC would set. Dealers are to replace the engine camshaft cover as necessary. The repairs will be made at no charge to the customer.
- [10163679](https://open.wenmarpro.com/bulletins/10163679), 2019-08-12: This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing. If the air cleaner housing does not have the correct content for the engine application as shown, dealer is instructed to replace the Air Cleaner Housing with the latest part listed in the Electronic Parts Catalog.
- [10161925](https://open.wenmarpro.com/bulletins/10161925), 2019-07-01: 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.
- [10161902](https://open.wenmarpro.com/bulletins/10161902), 2019-07-01: 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.
- [10141357](https://open.wenmarpro.com/bulletins/10141357), 2018-06-18: This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing. If the air cleaner housing does not have the correct content for the engine application as shown, dealer is instructed to replace the Air Cleaner Housing with the latest part listed in the Electronic Parts Catalog.
- [10137527](https://open.wenmarpro.com/bulletins/10137527), 2018-05-21: This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing. If the air cleaner housing does not have the correct content for the engine application as shown, dealer is instructed to replace the Air Cleaner Housing with the latest part listed in the Electronic Parts Catalog.
- [10135365](https://open.wenmarpro.com/bulletins/10135365), 2018-05-07: This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing Identification Code. If the Hydro Carbon Absorber is missing, or the Identification code is other than ACD, replace the Air Cleaner Housing with the latest listing in the Electronic Parts Catalog.
- [10113392](https://open.wenmarpro.com/bulletins/10113392), 2017-08-15: This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing Identification Code. If the Hydro Carbon Absorber is missing, or the Identification code is other than ACD, replace the Air Cleaner Housing with the latest listing in the Electronic Parts Catalog.
- [10113341](https://open.wenmarpro.com/bulletins/10113341), 2017-08-15: This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing Identification Code. If the Hydro Carbon Absorber is missing, or the Identification code is other than ACD, replace the Air Cleaner Housing with the latest listing in the Electronic Parts Catalog.