P26BB
1 owner report and 188 manufacturer filings across 37 model years from Buick, Cadillac, Chevrolet, GMC.
Where P26BB shows up
Source: NHTSA manufacturer communications and complaintsShowing the 25 model years where P26BB appears most; it is on file for 37 in total.
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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P26BB by make
The same record, one make at a time: the model years, bulletins and owner reports that name P26BB on that maker’s vehicles.
What it gets filed under
188 manufacturer filings name P26BB. 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 P26BB.
- PIE0697A Service bulletin2022-06-22 · Engine And Engine Cooling
- This engineering information (EI) is requesting information from the technician and to perform the check list provided in regards to a Malfunction Indicator Lamp (MIL) illuminated on driver information center (DIC) with DTCs P26BB and/or P2B60 Set.
- PIE0697 Service bulletin2022-05-06 · Equipment — Other — Owners/Service/Other Manual
- This engineering information (EI) is requesting information from the technician and to perform the check list provided in regards to a Malfunction Indicator Lamp (MIL) illuminated on driver information center (DIC) with DTCs P26BB and/or P2B60 Set.
- 22-NA-082 Service bulletin2022-04-14 · Electrical System
- This technical bulletin provides repair information to correct a customer concern of Malfunction Indicator Lamp Illuminated with DTC P06DD, P2B60, P26BB, P1098 Set.
- 21NA256 Service bulletin2021-12-13 · Engine And Engine Cooling — Engine — Engine Control Module (Ecu/Ecm)
- This service bulletin provides repair information for dealers/technicians to correct a customer concern of a Malfunction Indicator Lamp Illuminated with DTC P26BB Set.
- 21NA256 Service bulletin2021-11-09 · Visibility — Defroster/Defogger/Hvac System — Engine Coolant Hoses And Fittings
- This service bulletin provides repair information for dealers/technicians to correct a customer concern of a Malfunction Indicator Lamp Illuminated with DTC P26BB Set.
- PIP5675F Service bulletin2020-10-14 · Electrical System
- This Preliminary information communicates to the dealer that a customer may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history. That this may be caused by a software anomaly, and that GM is currently looking into the issue. It provides testing and related direction based on the results.
What P26BB means
Source: SAE J2012 / OBD-IIP26BB 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 P26BB
Source: NHTSA files and the OBD-II standardCan I keep driving with P26BB 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.