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Diagnostic trouble code · Buick

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.

Powertrain 15 model years 79 manufacturer filings

Which Buick model years name P1101

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2016 Buick EncoreEngine12—
2018 Buick EncoreEngine11—
2017 Buick EncoreEquipment11—
2019 Buick EncoreEngine9—
2016 Buick RegalEngine6—
2018 Buick EnvisionEngine5—
2018 Buick RegalEngine5—
2017 Buick EnvisionEngine5—
2017 Buick RegalEngine5—
2016 Buick VeranoEngine5—
2026 Buick EncoreNot specified1—
2024 Buick EncoreEngine1—
2024 Buick EnvistaEngine1—
2019 Buick EnvisionEngine1—
2019 Buick RegalEngine1—

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.

Engine 44 Equipment 20 Power Train 8 Equipment Adaptive/Mobility 2
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Buick filings that name P1101

Source: NHTSA manufacturer communications

Bulletins 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.

What P1101 means

Source: SAE J2012 / OBD-II

P1101 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.

From here

Common questions

Source: NHTSA files and the OBD-II standard

Is 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.