P2748: Intermediate-speed B intermittency is distinct from its noise and dropout checks

P2748 is the intermittent intermediate-shaft speed B circuit entry in Ford's summary, shown as P2745_1F. It should remain a specific electrical classification rather than being reduced to an undifferentiated statement that intermediate speed was incorrect.

Do not borrow a different monitor's event count

The document assigns noise, dropout and plausibility to separate detailed representations in the P2745 family. Its spike and dropout thresholds describe those dynamic strategies, not a published P2748 intermittency counter. Using them as a universal test for this code would change the source's meaning.

Ford also distinguishes electrical checks that can run without vehicle movement from comparisons that need credible speed and commanded-gear information. A later smooth speed trace cannot prove that the earlier electrical interruption did not occur.

Confirm that the B channel is the one being examined

The general section describes two intermediate sensors in the ten-speed arrangement and one in the listed eight-speed design. The actual transmission must therefore determine the sensor mapping. A generic B label is insufficient for choosing a physical component.

Useful evidence includes the full suffix, status changes and the signal history around the event. The summary does not locate an intermittent connection or provide a universal pin test. Verification needs the correct electrical procedure while keeping B's intermittent category separate from its functional speed interpretations.

Source and applicability

Ford 2024–2025 gasoline OBD operation summary, July 16 2024 revision; only the cited monitor and transmission architectures. No individual vehicle fitment or universal calibration is inferred. Ford PDF, page 149.