P0557
1 owner report and 92 manufacturer filings across 26 model years from Buick, Cadillac, Chevrolet, GMC.
Where P0557 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2018 Chevrolet Traverse | Equipment | 8 | — |
| 2018 Buick Enclave | Equipment | 6 | 1 |
| 2020 Buick Enclave | Service Brakes, Hydraulic | 4 | — |
| 2019 Buick Enclave | Equipment | 4 | — |
| 2020 Cadillac XT5 | Equipment | 4 | — |
| 2019 Cadillac XT5 | Service Brakes, Hydraulic | 4 | — |
| 2018 Cadillac XT5 | Service Brakes, Hydraulic | 4 | — |
| 2017 Cadillac XT5 | Service Brakes, Hydraulic | 4 | — |
| 2020 Cadillac XT6 | Engine | 4 | — |
| 2020 Chevrolet Blazer | Service Brakes, Hydraulic | 4 | — |
| 2019 Chevrolet Blazer | Service Brakes, Hydraulic | 4 | — |
| 2020 Chevrolet Traverse | Equipment | 4 | — |
| 2019 Chevrolet Traverse | Service Brakes, Hydraulic | 4 | — |
| 2020 GMC Acadia | Equipment | 4 | — |
| 2019 GMC Acadia | Service Brakes, Hydraulic | 4 | — |
| 2018 GMC Acadia | Service Brakes, Hydraulic | 4 | — |
| 2017 GMC Acadia | Service Brakes, Hydraulic | 4 | — |
| 2020 Buick Envision | Engine | 2 | — |
| 2019 Buick Envision | Service Brakes | 2 | — |
| 2018 Buick Envision | Engine | 2 | — |
| 2017 Buick Envision | Engine | 2 | — |
| 2016 Buick Envision | Service Brakes | 2 | — |
| 2021 Chevrolet Equinox | Engine | 2 | — |
| 2020 Chevrolet Equinox | Service Brakes | 2 | — |
| 2021 GMC Terrain | Engine | 2 | — |
| 2020 GMC Terrain | Engine | 2 | — |
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 P0557. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- 21NA1072021-11-17 · Engine
- This technical bulletin provides repair information to correct a customer concern of the Service Engine Soon Lamp Illuminated and/or Service Brake Assist Message Displayed, with DTC P0557 Stored.
- 21NA1072021-06-11 · Engine
- This technical bulletin provides repair information to correct a customer concern of the Service Engine Soon Lamp Illuminated and/or Service Brake Assist Message Displayed, with DTC P0557 Stored.
- 20NA0712020-06-01 · Service Brakes, Hydraulic — Power Assist
- This technical bulletin provides repair information to correct a customer concern of the Service Engine Soon Lamp illuminated and/or Service Power Brake Assist message displayed, with DTCs P0557 or P0558 Stored.
- 20NA0712020-04-17 · Power Train
- This technical bulletin provides repair information to correct a customer concern of the Service Engine Soon Lamp illuminated and/or Service Power Brake Assist message displayed, with DTCs P0557 or P0558 Stored.
- 20NA0712020-03-20 · Service Brakes, Hydraulic — Power Assist
- This technical bulletin provides repair information to correct a customer concern of the Service Engine Soon Lamp illuminated and/or Service Power Brake Assist message displayed, with DTCs P0557 or P0558 Stored.
- 17NA3142020-02-13 · Equipment
- This technical bulletin provides a procedure to replace the power brake booster vacuum check valve and hose to correct a condition of Intermittent Service Power Brake Assist Message With a Brake Shudder and Possible DTC P0557 Set/Stored due to the Power Brake Booster Vacuum Sensor providing intermittent incorrect vacuum values due to circuit board fault.
What P0557 means
Source: SAE J2012 / OBD-IIP0557 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
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 P0557
Source: NHTSA files and the OBD-II standardCan I keep driving with P0557 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.