Symptom hub
Reduced Engine Power Message: Throttle, Torque Model, or Voltage Problem?
When the dash explicitly says Reduced Engine Power, the smartest split is between electronic throttle control, internal torque-model logic, and the voltage or wiring faults that make both systems look guilty at once.
Likely related codes
Start your diagnostic path here
P0101 — Mass Air Flow Circuit Range/Performance P2135 — Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation P0121 — Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance P2101 — Throttle Actuator Control Motor Circuit Range/Performance P0122 — Throttle/Pedal Position Sensor/Switch A Circuit Low Input P0123 — Throttle/Pedal Position Sensor/Switch A Circuit High Input P2110 — Throttle Actuator Control System - Forced Limited RPM P2111 — Throttle Actuator Control System - Stuck Open P2112 — Throttle Actuator Control System - Stuck Closed P0562 — System Voltage Low P1516 — Throttle Actuator Control Module Throttle Actuator Position Performance P060A — Internal Control Module Monitoring Processor Performance P061B — Internal Control Module Torque Calculation Performance