Service bulletin PIE0657A

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10213770
Published by NHTSA	2022-06-13
Manufacturer's number	PIE0657A
Manufacturer's date	2022-01-14
NHTSA component	AIR BAGS

NHTSA's summary

This engineering information (EI) closure ends the need for further information from technicians in regards to the Check Engine Lamp illuminated on the Driver Information Center (DIC) with P0494 Set.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Air bags

Trouble codes named

P0494

Vehicles listed
BUICK ENVISION	2021
CADILLAC XT4	2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
21V421000	2021-06-10. AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT; ELECTRICAL SYSTEM:SOFTWARE
2021348	2021-06-03. Airbag

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
23-NA-110	2024-03-06. Service bulletin. This technical bulletin provides a procedure to correct the condition of Intermittent Service Airbag System message (DTC B0014 B0021).
PIE0672B	2022-06-13. Service bulletin. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Check Engine Lamp illuminated on Driver Information Center (DIC) and DTC P0607 Set in BCM to determine root cause.
21NA176	2022-05-31. Service bulletin. This service bulletin provides repair information to correct a customer concern of Airbag Warning Lamp Illuminated on Driver Information Center (DIC), DTC B0017 01 B0024 01 or B001E 01 Set.
PIC6048N	2022-02-14. Service bulletin. This Preliminary Information communicates to the technician that some customers may comment on the operation of their haptic seat during a Lane Keep Assist event. Lane Keep Assist works differently than Lane Departure Warning. The Lane Keep Assist icon is solid amber, Forward Camera Module is actively commanding a torque to Electronic Power Steering. This means that the driver should also feel some feedback from the steering wheel. No Chimes or haptic in the seat. Lane Keep Assist icon is flashing amber; Forward Camera Module is actively commanding torque to Electronic Power Steering. This will also be accompanied with Lane Departure Warning chimes and haptic in the seat feedback based on the setting chosen in the vehicle settings. This will take place when the vehicle has crossed lane marking by (40 cm) or (15.75 in).
PIC5650J	2021-09-13. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.
PIE0626	2021-05-03. Service bulletin. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Traction Control System and/or Electronic Stability Control message illuminated on Driver Information Center (DIC).
PIE0611B	2021-05-03. Service bulletin. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Airbag Warning Lamp illuminated on the Driver Information Center (DIC).
N202321843 01	2021-03-22. Service bulletin. Service Update. On certain vehicles equipped with automatic transmissions, the clutch spring retaining ring may not be fully seated. Vehicles with this condition may set DTC Code P0747 and the MIL light (malfunction indicator light) will illuminate. This typically occurs at low mileage. Dealers will inspect the transmission by following the procedure and if it fails, the transmission will be replaced.
N202321843	2021-02-16. Service bulletin. Service Update. On certain vehicles equipped with automatic transmissions, the clutch spring retaining ring may not be fully seated. Vehicles with this condition may set DTC Code P0747 and the MIL light (malfunction indicator light) will illuminate. This typically occurs at low mileage. Dealers are to perform the inspection procedure contained within this bulletin.
N202321920	2021-02-16. Service bulletin. Service Update. A small number of vehicles may have a coolant inlet pipe that may present an obstructed threaded hole for the coolant temp sensor which could result in the check engine light coming on or a potential coolant leak. Dealers are to replace the coolant inlet pipe and temperature sensor.