P2748 code meaning
Intermediate Shaft Speed Sensor B Circuit Intermittent
Powertrain system Generic code P27xx codes Check engine light
What P2748 means
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.
P2748 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of P2748
- Warning lamp that comes and goes
- Occasional harsh shift or shift flare
Common causes of P2748
- Most likelyTerminal with weak contact pressure in the sensor or gearbox connector
- PossibleHarness rubbing through and touching ground intermittently
- PossibleMoisture or corrosion in the connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Intermediate shaft speed sensor bWiring harness
What each part of P2748 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 7 | Area: transmission. |
| 48 | The exact fault in that area. |
What to do next
- Note P2748 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2748
What does P2748 mean?
P2748 means "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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2748?
Drive gently and only to a workshop. With P2748 the car can go into limp mode (reduced power) to protect itself.
Will P2748 fail an emissions test?
Yes, it can. P2748 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2748 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P2748 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.