What do P0301 and P0201 together mean?

The useful first interpretation is that the records concern cylinder one in two different ways: P0301 is a cylinder-specific misfire code within Ford’s description of P0300–P0310, and P0201 is an injector-circuit record in Ford’s documented gasoline systems.[S1][S2] That pairing makes the cylinder-one injector circuit relevant to the diagnostic conversation, but it does not establish that the injector is mechanically faulty or identify the cause of the misfire. The Ford references describe Ford systems; they do not establish code definitions or diagnostic procedures for every make, model, and engine. Ask for applicable vehicle-specific service information to be used.

No—not from the code alone. In the cited Ford gasoline OBD summary, P0201 is part of a group of cylinder-specific injector-circuit records involving opens or shorts in the documented systems.[S1] A circuit record is not proof that the injector has a mechanical fault, and the paired codes do not by themselves establish a failed part.[S1][S2] Treat replacement as a conclusion to be supported by vehicle-specific diagnosis, not as an automatic response to the code. Avoid trying electrical tests or removing parts based only on this interpretation; ask a qualified diagnostic professional what checks apply to your vehicle.

Write down the year, make, model, and engine, plus the exact codes as displayed. Include whether each is current, pending, or stored if your scan tool reports that status; don’t guess if it doesn’t. Save the freeze-frame information and note the conditions shown there, such as engine speed or load if those fields are present. This context is information to share, not a diagnosis. Also record when you first noticed a concern and any changes you observed, using your own words. Don’t clear codes just to make the display look different before the appointment; ask the shop whether it needs the records preserved.

Send a neutral summary and ask the technician to verify the definitions and diagnostic approach against information for your exact vehicle. For example:

“Vehicle: [year] [make] [model], [engine]. Scan shows P0301 and P0201. Status: [as displayed]. Freeze-frame/context: [copy available fields, or ‘not available’]. Observed concern and when it occurs: [brief description]. Please confirm what these codes mean for this vehicle, review the saved context, and explain what evidence supports any proposed repair before replacing parts.”

You can also ask whether both records are current, what findings support the recommended repair, and whether the explanation distinguishes an injector-circuit issue from a mechanically faulty injector. The code references alone do not settle those questions.