What does code P2550 mean?

Q: What does code P2550 mean?

Torque Management Request Input Signal 'B' Low. P2550 indicates that the powertrain control module (PCM) has detected an abnormally low voltage on the torque management request input signal 'B' circuit. This signal is used by the PCM to coordinate torque reduction requests from systems such as the transmission controller or electronic stability control, and a low reading means the circuit is shorted to ground, open, or the sending component has failed.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P2550

P2550Torque Management Request Input Signal 'B' Low

P2550 indicates that the powertrain control module (PCM) has detected an abnormally low voltage on the torque management request input signal 'B' circuit. This signal is used by the PCM to coordinate torque reduction requests from systems such as the transmission controller or electronic stability control, and a low reading means the circuit is shorted to ground, open, or the sending component has failed.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

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