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Diagnostic trouble code · Chevrolet

B1A62 on Chevrolet vehicles

B1A62 is named on 9 Chevrolet model years (2021–2023): 27 manufacturer filings and 1 owner report in NHTSA’s files, across Suburban, Tahoe, Corvette.

Body 9 model years 27 manufacturer filings 1 owner report

Which Chevrolet model years name B1A62

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2022 Chevrolet SuburbanElectrical System6—
2021 Chevrolet SuburbanElectrical System6—
2023 Chevrolet SuburbanEquipment3—
2023 Chevrolet TahoeEquipment3—
2022 Chevrolet TahoeElectrical System3—
2021 Chevrolet TahoeEquipment3—
2023 Chevrolet CorvetteEquipment11
2022 Chevrolet CorvetteElectrical System1—
2021 Chevrolet CorvetteElectrical System1—

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.

Electrical System 15 Equipment 13
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What Chevrolet owners said

Source: NHTSA complaint database

Owners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.

I got it to act up that Saturday 3/18/23 with 123 miles, and it showed 2 DTC's (B1A62 and U0131), but with a limited staff, they had no one to look at it
2023 Chevrolet Corvette Mar 29, 2023 NHTSA owner report

Chevrolet filings that name B1A62

Source: NHTSA manufacturer communications

Bulletins and campaigns Chevrolet filed with NHTSA whose summary names B1A62. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What B1A62 means

Source: SAE J2012 / OBD-II

B1A62 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 Chevrolet 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 B1A62 a known problem on Chevrolet vehicles?

It is a documented one: NHTSA's files hold 27 manufacturer filings and 1 owner report naming B1A62 on 9 Chevrolet model years (2021–2023). 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 Chevrolet models does B1A62 appear on most?

2022 Suburban (6 documents), 2021 Suburban (6 documents), 2023 Suburban (3 documents).

Does B1A62 on a Chevrolet 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.