P2B87
0 owner reports and 37 manufacturer filings across 16 model years from Buick, Cadillac, Chevrolet, GMC.
Where P2B87 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2021 Chevrolet Suburban | Electrical System | 4 | — | Battery → |
| 2021 Chevrolet Tahoe | Electrical System | 4 | — | Battery → |
| 2021 Buick Enclave | Engine | 3 | — | |
| 2021 Cadillac XT5 | Engine | 3 | — | |
| 2021 Cadillac XT6 | Fuel/Propulsion System | 3 | — | Fuel pump → |
| 2021 Chevrolet Blazer | Air Bags | 3 | — | |
| 2021 Chevrolet Traverse | Air Bags | 3 | — | |
| 2021 GMC Acadia | Engine | 3 | — | |
| 2026 GMC Yukon | Not specified | 2 | — | |
| 2025 GMC Yukon | Not specified | 2 | — | |
| 2024 GMC Yukon | Not specified | 2 | — | |
| 2022 Buick Enclave | Engine | 1 | — | |
| 2026 Chevrolet Suburban | Not specified | 1 | — | |
| 2025 Chevrolet Suburban | Not specified | 1 | — | |
| 2026 Chevrolet Tahoe | Not specified | 1 | — | |
| 2025 Chevrolet Tahoe | Not specified | 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.
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P2B87 by make
The same record, one make at a time: the model years, bulletins and owner reports that name P2B87 on that maker’s vehicles.
What it gets filed under
37 manufacturer filings name P2B87. 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 P2B87.
- PIT6505 Service bulletin2026-04-16 · Unknown Or Other
- This preliminary information communicates an issue with an SES MIL DTC P2B87 and/or P2B86 cause by the Aux heater coolant pump have an unwanted oring stuck in the pump. Dealers are to remove oring and reinstall pump.
- 21NA024 Service bulletin2022-01-18 · Engine
- This technical bulletin provides repair information to correct a customer concern of Service Engine Soon MIL Illuminated with DTC P2B87 Set.
- PIT5804 Service bulletin2020-12-27 · Fuel System, Gasoline
- This Preliminary information communicates that a customer may bring a vehicle in with an SES light on. If the technician finds a code P2B87 (auxiliary coolant pump underspeed) set in the ECM they are directed to not replace the G17 heater coolant pump because this will not fix the concern. The techician is instructed to clear the code and release the vehicle to the customer with the explanation th
- PIT5804 Service bulletin2020-12-27 · Engine And Engine Cooling
- This Preliminary information communicates that a customer may bring a vehicle in with an SES light on. If the technician finds a code P2B87 (auxiliary coolant pump underspeed) set in the ECM they are directed to not replace the G17 heater coolant pump because this will not fix the concern. The techician is instructed to clear the code and release the vehicle to the customer with the explanation th
- PIT5789A Service bulletin2020-12-03 · Electrical System — Body Control Module/Bcm
- This Preliminary information communicates an issues with an SES MIL and DTC P2B87 setting. Engineering is working on releasing updated BCM cals to correct the concern.
- PIT5789A Service bulletin2020-12-03 · Electrical System — Body Control Module/Bcm
- This Preliminary information communicates an issues with an SES MIL and DTC P2B87 setting. Engineering is working on releasing updated BCM cals to correct the concern.
What P2B87 means
Source: SAE J2012 / OBD-IIP2B87 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 P2B87
Source: NHTSA files and the OBD-II standardCan I keep driving with P2B87 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.