B2B05
0 owner reports and 44 manufacturer filings across 9 model years from Cadillac, Chevrolet, GMC.
Where B2B05 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2022 Cadillac Escalade | Electrical System | 6 | — | Battery → |
| 2021 Cadillac Escalade | Engine | 6 | — | |
| 2022 Chevrolet Suburban | Engine | 6 | — | |
| 2021 Chevrolet Suburban | Engine | 6 | — | |
| 2022 GMC Yukon | Engine | 6 | — | |
| 2021 GMC Yukon | Electrical System | 6 | — | Battery → |
| 2022 Chevrolet Tahoe | Engine | 3 | — | |
| 2021 Chevrolet Tahoe | Equipment | 3 | — | |
| 2020 Cadillac CT5 | Electrical System | 2 | — | Battery → |
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.
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What it gets filed under
44 manufacturer filings name B2B05. Start with what the maker wrote down.
A code names the test that failed, not the part. A bulletin that names it is often a diagnosis someone has already written down — quote its number at the service desk.
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names B2B05.
- 22-NA-248 Service bulletin2024-07-11 · Electrical System
- This technical bulletin provides service information to correct a customer concern of HVAC Heat Intermittently Inoperative, DTCs B2B05 and/or B2B06 Set.
- 22-NA-248 Service bulletin2024-05-03 · Engine
- This technical bulletin provides service information to correct a customer concern of HVAC Heat Intermittently Inoperative, DTCs B2B05 and/or B2B06 Set.
- 22-NA-248 Service bulletin2023-01-19 · Engine And Engine Cooling
- This technical bulletin provides service information to correct a customer concern of HVAC Heat Intermittently Inoperative, DTCs B2B05 and/or B2B06 Set.
- 20NA068 Service bulletin2020-03-17 · Electrical System — Software
- This technical bulletin provides repair information to correct a customer concern of Service Engine Soon message with the following DTCs set: P00FF, B2B05, B2B06.
- PIC6400 Service bulletin2020-01-29 · Electrical System
- This preliminary information communicates a condition may exit causing DTC's P00FF, B2B05, B2B06 to set. Engineering is working on a solution.
What B2B05 means
Source: SAE J2012 / OBD-IIB2B05 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 B2B05
Source: NHTSA files and the OBD-II standardCan I keep driving with B2B05 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light means a fault was logged and the car should be checked soon; a flashing light means a severe misfire — slow down and get it seen as soon as possible, because severe misfire can quickly damage the catalytic converter. 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.