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Diagnostic trouble code · Ford

P1A3C on Ford vehicles

P1A3C is named on 9 Ford model years (2021–2024): 25 manufacturer filings and 0 owner reports in NHTSA’s files, across Mustang Mach-E, E-Transit, F-150 Lightning, Transit.

Powertrain 9 model years 25 manufacturer filings

Which Ford model years name P1A3C

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2021 Ford Mustang Mach-EElectrical System6—
2022 Ford Mustang Mach-EElectrical System4—
2023 Ford E-TransitElectrical System3—
2023 Ford Mustang Mach-EElectrical System3—
2022 Ford E-TransitElectrical System3—
2023 Ford F-150 LightningElectrical System2—
2022 Ford F-150 LightningElectrical System2—
2024 Ford Mustang Mach-EEquipment1—
2024 Ford TransitEquipment1—

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 14 Equipment 9 Not specified 2
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Ford filings that name P1A3C

Source: NHTSA manufacturer communications

Bulletins and campaigns Ford filed with NHTSA whose summary names P1A3C. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What P1A3C means

Source: SAE J2012 / OBD-II

P1A3C 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 Ford 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 P1A3C a known problem on Ford vehicles?

It is a documented one: NHTSA's files hold 25 manufacturer filings and 0 owner reports naming P1A3C on 9 Ford model years (2021–2024). 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 Ford models does P1A3C appear on most?

2021 Mustang Mach-E (6 documents), 2022 Mustang Mach-E (4 documents), 2023 E-Transit (3 documents).

Does P1A3C on a Ford 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.