What do P0301 and P0302 together mean?

On the Ford 6.4L diesel application described in the cited Ford document, P0301 means cylinder 1 misfire detected and P0302 means cylinder 2 misfire detected [S1]. That establishes the labels for that application only—not for every vehicle that can display these codes.

Treat the pair as information to investigate, not a verdict that a particular part has failed. The codes alone do not establish a shared cause. First identify the exact vehicle and engine, then have a qualified technician compare the codes and their recorded context with the applicable service information.

The cited code definitions apply to one specified application. The source does not establish cylinder numbering or physical location on other engines, or whether cylinders 1 and 2 are adjacent [S1]. So do not assume that a code label tells you where a cylinder is physically located on your vehicle.

Write down the year, make, model, and engine identification, if known. Ask the technician to confirm the engine layout and cylinder numbering using information applicable to that exact vehicle before interpreting the pair.

Gather the information you have, without trying to identify or test a component yourself. Record:

1. Year, make, model, and engine, if known.
2. Both exact codes and the status shown on the report. If the status is unclear, preserve the report and ask the technician to interpret it.
3. Any available freeze-frame information. The cited source says to consider code status and freeze-frame context, but does not establish a cause from that information [S1].
4. When you noticed the warning or obtained the codes, and any relevant changes you observed. Mark uncertain details as uncertain.

Keep the report available for the appointment so you can discuss what it actually showed.

You could say: “My vehicle is a [year] [make] [model] with a [engine, if known]. The scan report shows P0301 and P0302. The status shown is [status or ‘unclear’]. Available freeze-frame details are [details or ‘not available’]. Please confirm the engine’s cylinder numbering and interpret these codes using service information for this exact vehicle. What does the recorded context support, and what further checks are justified before recommending a repair?”

This asks for a vehicle-specific interpretation without presuming that the cylinders are adjacent or that one failed part explains both codes. The cited document confirms code labels only for its covered Ford application; it does not identify the cause on your vehicle or establish a repair [S1].