P1101 on Buick vehicles
P1101 is named on 15 Buick model years (2016–2026): 79 manufacturer filings and 0 owner reports in NHTSA’s files, across Encore, Regal, Envision, Verano, Envista.
Which Buick model years name P1101
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2016 Buick Encore | Engine | 12 | — |
| 2018 Buick Encore | Engine | 11 | — |
| 2017 Buick Encore | Equipment | 11 | — |
| 2019 Buick Encore | Engine | 9 | — |
| 2016 Buick Regal | Engine | 6 | — |
| 2018 Buick Envision | Engine | 5 | — |
| 2018 Buick Regal | Engine | 5 | — |
| 2017 Buick Envision | Engine | 5 | — |
| 2017 Buick Regal | Engine | 5 | — |
| 2016 Buick Verano | Engine | 5 | — |
| 2026 Buick Encore | Not specified | 1 | — |
| 2024 Buick Encore | Engine | 1 | — |
| 2024 Buick Envista | Engine | 1 | — |
| 2019 Buick Envision | Engine | 1 | — |
| 2019 Buick Regal | Engine | 1 | — |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Buick filings that name P1101
Source: NHTSA manufacturer communicationsBulletins and campaigns Buick filed with NHTSA whose summary names P1101. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- PIP5240A Service bulletin2017-01-25 · Engine And Engine Cooling — Cooling System
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing Identification Code. If the Hydro Carbon Absorber is missing, or the Identification code is other than ACD, replace the Air Cleaner
- PI0907C Service bulletin2016-10-10 · Equipment — Other — Owners/Service/Other Manual
- This preliminary informational bulletin provides repair information to correct a customers concern of check engine light on with DTC P1101 set.
- PIP5240D Service bulletin2018-04-27 · Engine And Engine Cooling
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing. If the air cleaner housing does not have the correct content for the engine application as shown, dealer is instructed to replace
- PIP5240E Service bulletin2018-05-15 · Engine
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing. If the air cleaner housing does not have the correct content for the engine application as shown, dealer is instructed to replace
- PIP5240F Service bulletin2019-07-25 · Equipment — Appliance — Air Conditioner
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing. If the air cleaner housing does not have the correct content for the engine application as shown, dealer is instructed to replace
- 18NA333 Service bulletin2019-07-12 · Engine
- This technical bulletin provides repair information to correct a customer concern of malfunction indicator lamp (MIL) on, whistle type noise at startup, DTC P1101 set.
- 20NA047 Service bulletin2020-02-28 · Equipment
- This technical bulletin provides a service procedure to correct conditions of Front or Rear Crankshaft Oil Leak, MIL Illuminated with DTC P1101 Set.
- PIP-5402 Service bulletin2016-05-17 · Engine
- THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES THE TECHNICIAN WITH THE DIAGNOSIS AND REPAIR STEPS FOR A VEHICLE WITH A CHECK ENGINE LIGHT ON WITH DIAGNOSTIC TROUBLE CODE P015B OR A REDUCED ENGINE POWER MESSAGE WITH DIAGNOSTIC TROUBLE CODE P1101. TECHNICIAN SHOULD LOOK FOR A MISSING OR DAMAGED O-RING SEAL IN THE CHARGE AIR COOLER COUPLER.
- PIP5402A Service bulletin2017-06-19 · Equipment — Other — Owners/Service/Other Manual
- This Preliminary Information communication provides the technician with the diagnosis and repair steps for a vehicle with a check engine light on with Diagnostic Trouble Code P015B or a reduced engine power message with Diagnostic Trouble Code P1101. Technician should look for a missing or damaged O-ring seal in the charge air cooler coupler.
- PIP5402D Service bulletin2018-07-25 · Engine And Engine Cooling
- This Preliminary Information communication provides the technician with the diagnosis and repair steps for a vehicle with a check engine light on with Diagnostic Trouble Code P015B or a reduced engine power message with Diagnostic Trouble Code P1101. Technician should look for a missing or damaged O-ring seal in the charge air cooler coupler.
- PIP5402B Service bulletin2017-09-19 · Engine And Engine Cooling
- This Preliminary Information communication provides the technician with the diagnosis and repair steps for a vehicle with a check engine light on with Diagnostic Trouble Code P015B or a reduced engine power message with Diagnostic Trouble Code P1101. Technician should look for a missing or damaged O-ring seal in the charge air cooler coupler.
- PIP6112 Service bulletin2026-05-04 · Unknown Or Other
- This Preliminary information communicates to the technician the diagnostic direction necessary to address MIL illumination with DTCs P0121, P0299, P1101 or P00C7.
What P1101 means
Source: SAE J2012 / OBD-IIP1101 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. The record above is what Buick and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P1101 a known problem on Buick vehicles?
It is a documented one: NHTSA's files hold 79 manufacturer filings and 0 owner reports naming P1101 on 15 Buick model years (2016–2026). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Buick models does P1101 appear on most?
2016 Encore (12 documents), 2018 Encore (11 documents), 2017 Encore (11 documents).
Does P1101 on a Buick mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.