What does code P2AA6 mean?

DTC codes / P2Axx · Hybrid propulsion / P2AA6

P2AA6EGR Cooler Bypass Control Circuit Driver Current/Temperature Too High Bank 2

P2AA6 means the engine computer has detected that the driver circuit for the bank 2 exhaust gas recirculation (EGR) cooler bypass valve is drawing excessive current or has reached an abnormally high internal temperature. The computer monitors the driver chip that controls the bypass valve solenoid and sets this code when the current or temperature exceeds a safe threshold, indicating a short circuit, a failing solenoid, or a 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.