What does code P2AD1 mean?

DTC codes / P2Axx · Hybrid propulsion / P2AD1

P2AD1Throttle/Pedal Position Sensor/Switch C/G Voltage Correlation

P2AD1 indicates that the engine control module (ECM) has detected a correlation error between the throttle position sensor or pedal position sensor 'C' and the corresponding 'G' circuit, meaning the two signals do not agree within the expected range. The ECM compares the voltages from these two sensors and sets the code when the difference exceeds a calibrated threshold for a specified time, often due to a faulty sensor, wiring issue, or mechanical binding.

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.