What does code P2595 mean?

Q: What does code P2595 mean?

Turbocharger Speed Sensor B Circuit Low. P2595 means the engine control module has detected a low-voltage signal from the turbocharger speed sensor B circuit, which typically monitors the speed of the low-pressure turbo in a twin-turbo system. The sensor's output is below the expected threshold for the current operating conditions, so the module cannot reliably determine turbocharger speed and may limit boost to protect the engine.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P2595

P2595Turbocharger Speed Sensor B Circuit Low

P2595 means the engine control module has detected a low-voltage signal from the turbocharger speed sensor B circuit, which typically monitors the speed of the low-pressure turbo in a twin-turbo system. The sensor's output is below the expected threshold for the current operating conditions, so the module cannot reliably determine turbocharger speed and may limit boost to protect the engine.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.