What does code P2644 mean?

Q: What does code P2644 mean?

Torque Management Feedback Signal 'B' High. P2644 means the powertrain control module (PCM) has detected an abnormally high voltage on the torque management feedback signal 'B' circuit, which is typically a second return or redundant signal from the transmission or engine torque control system. The PCM expects this signal to stay within a calibrated voltage range, and a sustained high reading tells the computer that the feedback circuit is shorted to power, open, or reporting an implausible torque value.

DTC codes / P26xx · Computer and output circuits / P2644

P2644Torque Management Feedback Signal 'B' High

P2644 means the powertrain control module (PCM) has detected an abnormally high voltage on the torque management feedback signal 'B' circuit, which is typically a second return or redundant signal from the transmission or engine torque control system. The PCM expects this signal to stay within a calibrated voltage range, and a sustained high reading tells the computer that the feedback circuit is shorted to power, open, or reporting an implausible torque value.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaComputer and output circuits

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