P2749 code meaning
Intermediate Shaft Speed Sensor C Circuit
Powertrain system Generic code P27xx codes Check engine light
What P2749 means
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.
P2749 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 6 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2749
- Check engine light
- Harsh shifts or limp-home mode
Common causes of P2749
- Most likelyOpen or grounded wire between module and sensor C
- PossibleSensor C defective
- Less likelyTransmission control module input fault
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 cWiring harness
What each part of P2749 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. |
| 49 | The exact fault in that area. |
What to do next
- Note P2749 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 P2749
What does P2749 mean?
P2749 means "Intermediate Shaft Speed Sensor C Circuit". P2749 covers an electrical fault in the circuit of a third intermediate shaft speed sensor, C. It is a generic code, so it means the same on every make.
Is it safe to drive with P2749?
Drive gently and only to a workshop. With P2749 the car can go into limp mode (reduced power) to protect itself.
Will P2749 fail an emissions test?
Yes, it can. P2749 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 P2749 to fix?
Difficulty: hard. A typical repair takes 0.5 to 6 hours of work. This is a job for a workshop.
Will P2749 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.