P2749Intermediate Shaft Speed Sensor C Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2749 covers an electrical fault in the circuit of a third intermediate shaft speed sensor, C. No manufacturer documents P2749 publicly, and it is unclear which transmission carries three such sensors: Ford's ten-speeds stop at B, and dual-clutch units have only two clutch shafts. CARB requires transmission inputs like this to be watched for broken circuits and readings beyond their span. Following Ford's published logic for sensors A and B, a module would detect an open or a short to ground in hardware within about 1.5 s, independent of driving. The split codes P07C9/P07CA cover low and high voltage separately. If it occurs, start with the live value of sensor C next to the other speeds, then check connector, wiring and sensor resistance.
- What you may notice
- Check engine light
- Harsh shifts or limp-home mode
- Likely causes
- LikelyOpen or grounded wire between module and sensor C
- PossibleSensor C defective
- RareTransmission control module input fault
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.