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Diagnostic trouble code · Alfa Romeo

P0740 on Alfa Romeo vehicles A fault in the torque converter clutch circuit

P0740 is named on 12 Alfa Romeo model years (2017–2022): 12 manufacturer filings and 0 owner reports in NHTSA’s files, across 4C, Giulia, Stelvio.

Powertrain 12 model years 12 manufacturer filings

Which Alfa Romeo model years name P0740

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2022 Alfa Romeo GiuliaPower Train1—
2022 Alfa Romeo StelvioPower Train1—
2021 Alfa Romeo GiuliaPower Train1—
2021 Alfa Romeo StelvioPower Train1—
2020 Alfa Romeo GiuliaPower Train1—
2020 Alfa Romeo StelvioPower Train1—
2019 Alfa Romeo GiuliaPower Train1—
2019 Alfa Romeo StelvioPower Train1—
2018 Alfa Romeo 4CPower Train1—
2018 Alfa Romeo GiuliaPower Train1—
2018 Alfa Romeo StelvioPower Train1—
2017 Alfa Romeo GiuliaPower Train1—

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.

Power Train 12
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Alfa Romeo filings that name P0740

Source: NHTSA manufacturer communications

Bulletins and campaigns Alfa Romeo filed with NHTSA whose summary names P0740. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What P0740 means

Source: SAE J2012 / OBD-II

A fault in the torque converter clutch circuit.

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 P0740 a known problem on Alfa Romeo vehicles?

It is a documented one: NHTSA's files hold 12 manufacturer filings and 0 owner reports naming P0740 on 12 Alfa Romeo model years (2017–2022). 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 P0740 appear on most?

2018 4C (1 document), 2022 Giulia (1 document), 2021 Giulia (1 document).

Does P0740 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.