P2784 Possible Causes
- Faulty input speed sensor
- Input speed sensor harness is open or shorted
- Poor electrical connection in the input speed sensor circuit
How to Fix Code P2784
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Check engine light on (or service engine soon warning light)
P2784 Meaning
The input speed sensor detects the rotational speed of the primary pulley and sends a signal to the Transmission Control Module (TCM) and Engine Control Module (ECM). The ECM sets the OBDII code when the input speed sensor is outside factory specifications.