The P2749 code indicates that the engine control module has detected an electrical circuit malfunction with the Intermediate Shaft Speed Sensor C. This sensor monitors the rotational speed of the transmission's intermediate shaft to help the computer determine shift timing and gear selection.
The internal circuitry of the Intermediate Shaft Speed Sensor C has failed or developed an internal short.
Wires leading to the sensor are frayed, broken, or shorted due to heat, vibration, or abrasion.
Moisture or contaminants have entered the sensor connector, causing high resistance or a loss of signal.
Metallic shavings or contaminants on the sensor tip are interfering with the magnetic signal.
The transmission control module (TCM) or PCM has an internal circuit failure preventing it from processing the sensor signal.
No. This is a circuit code related to electrical signals; fluid levels generally cause performance codes rather than circuit-specific faults.
No. It is very rare for the PCM to be the cause of P2749. The sensor and its associated wiring are far more likely to fail.
Yes, but the transmission may operate in a limited capacity or 'limp mode' to protect internal components from damage.