P2748 Intermediate Shaft Speed Sensor B Circuit Intermittent

P2748 records short interruptions in the sensor B circuit that heal before a permanent fault can be confirmed. Ford is the one maker that documents it: in the 2024 OBD summary, P2748 is the intermittent check of intermediate shaft sensor B on its ten-speed automatics, run continuously alongside the circuit code P2745 and the plausibility code P2746 within a 30 s monitoring window. Because the signal recovers, the fault often appears only under vibration, at high fluid temperature or when the harness flexes with engine movement. Freeze-frame data showing speed, gear and temperature at the moment of the dropout narrow the search. Replacing the sensor without checking pins and harness rarely ends the problem; drivers may notice occasional harsh shifts.

Likely causes

Symptoms

• Warning lamp that comes and goes
• Occasional harsh shift or shift flare

Repair estimate

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

Related codes

References: fordservicecontent.com, law.cornell.edu.