What does code P2AA7 mean?

Q: What does code P2AA7 mean?

Engine Coolant Bypass Valve B Position Sensor Circuit. P2AA7 indicates that the powertrain control module (PCM) has detected an abnormal signal from the position sensor circuit of engine coolant bypass valve B, which is used to manage coolant flow for faster warm-up and cabin heating. The PCM compares the sensor voltage against expected values and sets this code when the signal falls outside the valid range or behaves erratically.

DTC codes / P2Axx · Hybrid propulsion / P2AA7

P2AA7Engine Coolant Bypass Valve B Position Sensor Circuit

P2AA7 indicates that the powertrain control module (PCM) has detected an abnormal signal from the position sensor circuit of engine coolant bypass valve B, which is used to manage coolant flow for faster warm-up and cabin heating. The PCM compares the sensor voltage against expected values and sets this code when the signal falls outside the valid range or behaves erratically.

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.