What does code P2784 mean?

Q: What does code P2784 mean?

Input/Turbine Speed Sensor 'A'/'B' Correlation. P2784 indicates that the transmission control module has detected a mismatch between the signals from two input or turbine speed sensors, typically labeled 'A' and 'B'. The computer compares these readings to verify that the transmission input speed is being reported consistently, and it sets this code when the correlation between the two sensors falls outside the expected range.

DTC codes / P27xx · Transmission / P2784

P2784Input/Turbine Speed Sensor 'A'/'B' Correlation

P2784 indicates that the transmission control module has detected a mismatch between the signals from two input or turbine speed sensors, typically labeled 'A' and 'B'. The computer compares these readings to verify that the transmission input speed is being reported consistently, and it sets this code when the correlation between the two sensors falls outside the expected range.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaTransmission

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.