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Diagnostic trouble code

P003A

1 owner report and 27 manufacturer filings across 12 model years from Chevrolet, Ford, GMC, Ram.

PowertrainGeneric OBD-II code27 manufacturer filings1 owner report

Where P003A shows up

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2022 Ford F-250 Super DutyEngine And Engine Cooling3
2021 Ford F-250 Super DutyEngine And Engine Cooling3
2020 Ford F-250 Super DutyEngine And Engine Cooling3
2022 Ford F-350 Super DutyEngine And Engine Cooling3
2021 Ford F-350 Super DutyEngine And Engine Cooling3
2022 Ford F-450 Super DutyEquipment3
2021 Ford F-450 Super DutyEquipment3
2020 Ford F-450 Super DutyEngine And Engine Cooling3
2016 Chevrolet ExpressFuel System, Diesel1
2016 Chevrolet Silverado 3500HDEngine And Engine Cooling1
2016 GMC Sierra 3500HDFuel System, Diesel1
2019 Ram 2500Engine1

A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.

What it gets filed under

Engine And Engine Cooling 15Unknown Or Other 8Fuel System, Diesel 2Equipment 2Engine 1
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What owners said

Source: NHTSA complaint database

Owners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.

I have experienced unexpected loss of power during acceleration, lack of exhaust breaking and engine codes p003a and p006f which I believe are associated with the turbo actuator
2019 Ram 2500Nov 11, 2025NHTSA owner report

Manufacturer filings that name it

Source: NHTSA manufacturer communications

Service bulletins and campaigns whose filed summary names P003A. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.

What P003A means

Source: SAE J2012 / OBD-II

P003A 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. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.

Common questions about P003A

Source: NHTSA files and the OBD-II standard

Can I keep driving with P003A stored?

Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. The safe read of this page is the mileage and the components, not permission.

Does a code mean the car is recalled?

No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.

Why do the counts here differ from other sites?

Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.

Will clearing the code fix it?

Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.