What does code P2AE9 mean?

DTC codes / P2Axx · Hybrid propulsion / P2AE9

P2AE9Intake Air O2 Sensor Pumping Current Trim Circuit Open Bank 2

P2AE9 indicates that the engine control module has detected an open circuit in the pumping current trim circuit for the intake air oxygen sensor on bank 2. This sensor, often a wideband or air-fuel ratio sensor, uses a pumping current to measure oxygen concentration, and an open in the trim circuit prevents the module from accurately controlling that current, so the sensor signal becomes unreliable.

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.