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Diagnostic trouble code · Alfa Romeo

B22A9 on Alfa Romeo vehicles

B22A9 is named on 15 Alfa Romeo model years (2020–2025): 15 manufacturer filings and 0 owner reports in NHTSA’s files, across Giulia, Stelvio, Tonale, Tonale eAWD.

Body 15 model years 15 manufacturer filings

Which Alfa Romeo model years name B22A9

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2025 Alfa Romeo GiuliaElectrical System1—
2025 Alfa Romeo StelvioElectrical System1—
2025 Alfa Romeo TonaleElectrical System1—
2024 Alfa Romeo GiuliaElectrical System1—
2024 Alfa Romeo StelvioElectrical System1—
2024 Alfa Romeo TonaleElectrical System1—
2023 Alfa Romeo GiuliaElectrical System1—
2023 Alfa Romeo StelvioElectrical System1—
2023 Alfa Romeo Tonale eAWDElectrical System1—
2022 Alfa Romeo GiuliaElectrical System1—
2022 Alfa Romeo StelvioElectrical System1—
2021 Alfa Romeo GiuliaElectrical System1—
2021 Alfa Romeo StelvioElectrical System1—
2020 Alfa Romeo GiuliaElectrical System1—
2020 Alfa Romeo StelvioElectrical 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
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Alfa Romeo filings that name B22A9

Source: NHTSA manufacturer communications

Bulletins and campaigns Alfa Romeo filed with NHTSA whose summary names B22A9. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What B22A9 means

Source: SAE J2012 / OBD-II

B22A9 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. The record above is what Alfa Romeo 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 B22A9 a known problem on Alfa Romeo vehicles?

It is a documented one: NHTSA's files hold 15 manufacturer filings and 0 owner reports naming B22A9 on 15 Alfa Romeo model years (2020–2025). 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 Alfa Romeo models does B22A9 appear on most?

2025 Giulia (1 document), 2024 Giulia (1 document), 2023 Giulia (1 document).

Does B22A9 on a Alfa Romeo 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.