What does code P2DC4 mean?

DTC codes / P2Dxx · Hybrid propulsion / P2DC4

P2DC4Starter/Generator Phase Y Current Sensor Circuit Range/Performance

P2DC4 indicates that the engine control module (ECM) has detected an out-of-range or erratic signal from the phase Y current sensor in the starter/generator system, which is part of a mild-hybrid or integrated starter-generator setup. The sensor monitors current flow in one phase of the three-phase winding, and the ECM sets this code when the reported current does not match expected values under specific operating conditions.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.