Powertrain, generic (extended)

P2749 Intermediate Shaft Speed Sensor C Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Open or grounded wire between module and sensor C
Sensor C defective
Transmission control module input fault

Symptoms

  • Check engine light
  • Harsh shifts or limp-home mode

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,500
Time0.5–6 h

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

Parts involved

intermediate shaft speed sensor cwiring harness

Related codes

P2750P2751P2752P07C9P07CAP2745

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