B172E
0 owner reports and 41 manufacturer filings across 15 model years from Buick, Cadillac, Chevrolet, GMC.
Where B172E shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2018 Buick LaCrosse | Equipment | 4 | — |
| 2017 Buick LaCrosse | Electrical System | 4 | — |
| 2018 Buick Enclave | Electrical System | 3 | — |
| 2018 Buick Envision | Electrical System | 3 | — |
| 2017 Buick Envision | Electrical System | 3 | — |
| 2018 Cadillac XT5 | Electrical System | 3 | — |
| 2017 Cadillac XT5 | Electrical System | 3 | — |
| 2018 Chevrolet Equinox | Electrical System | 3 | — |
| 2018 GMC Acadia | Electrical System | 3 | — |
| 2017 GMC Acadia | Electrical System | 3 | — |
| 2018 GMC Terrain | Electrical System | 3 | — |
| 2018 Cadillac CT6 | Electrical System | 2 | — |
| 2017 Cadillac CT6 | Electrical System | 2 | — |
| 2019 Buick Envision | Seats | 1 | — |
| 2016 Buick Envision | Seats | 1 | — |
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
What it gets filed under
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names B172E. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- 20NA0032020-02-03 · Seats
- This technical bulletin provides repair information to correct a customer concern of the Service Driver Assist Message Illuminated, Front Seat Lane Departure Warning Actuator Inoperative, DTC B172E Set.
- 18NA0862019-02-05 · Lane Departure
- This technical bulletin provides a procedure to replace the Front Seat Lane Departure Warning Actuator if the B172E is set in the seat control module.
- PIT5590B2018-07-03 · Equipment — Electrical
- This Preliminary information communicates to the technician, that they may be working on a concern of a Service Driver Assist System Message with B172E stored in history Do not replace any parts. Engineering is aware of the issue and a new control module is in development and will be available Q1 2018.
- PIT5590A2017-11-17 · Equipment — Electrical
- This Preliminary information communicates to the technician, that they may be working on a concern of a Service Driver Assist System Message with B172E stored in history Do not replace any parts. Engineering is aware of the issue and a new control module is in development and will be available Q1 2018.
- PIT55902017-10-12 · Electrical System — Software
- This Preliminary information communicates to the technician, that they may be working on a concern of a Service Driver Assist System Message with B172E stored in history Do not replace any parts. Engineering is aware of the issue and a new control module is in development and will be available Q1 2019.
What B172E means
Source: SAE J2012 / OBD-IIB172E is a manufacturer-specific code: the second character is a 1, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.
A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about B172E
Source: NHTSA files and the OBD-II standardWhy does this page not define B172E?
Because it cannot be defined honestly. The second character of a trouble code says who owns its meaning, and a 1 or a 3 hands that to the manufacturer. Sites that print one definition for a manufacturer-specific code are showing you one automaker's meaning and hoping it is yours.
Can I keep driving with B172E stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.