What does code P2DA1 mean?

Q: What does code P2DA1 mean?

Gear Shift Control Module B Supply Voltage Low. P2DA1 indicates that the transmission control module (TCM) has detected a low supply voltage at the gear shift control module B, which is often a secondary control unit responsible for executing shift commands. The TCM monitors the power feed to this module and sets the code when the voltage falls below a calibrated threshold, typically because of a weak battery, poor connection, or wiring fault.

DTC codes / P2Dxx · Hybrid propulsion / P2DA1

P2DA1Gear Shift Control Module B Supply Voltage Low

P2DA1 indicates that the transmission control module (TCM) has detected a low supply voltage at the gear shift control module B, which is often a secondary control unit responsible for executing shift commands. The TCM monitors the power feed to this module and sets the code when the voltage falls below a calibrated threshold, typically because of a weak battery, poor connection, or wiring fault.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

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