What does code P25F0 mean?

Q: What does code P25F0 mean?

Vacuum Pump Control Circuit B Low. P25F0 indicates that the powertrain control module (PCM) has detected an abnormally low voltage condition on the control circuit for vacuum pump 'B', which is often the secondary or auxiliary pump used for brake assist or emission-related vacuum supply. The PCM monitors the commanded state of the pump and the resulting circuit voltage, and it sets this code when the voltage on the control circuit falls below the expected threshold while the pump is commanded on or off.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25F0

P25F0Vacuum Pump Control Circuit B Low

P25F0 indicates that the powertrain control module (PCM) has detected an abnormally low voltage condition on the control circuit for vacuum pump 'B', which is often the secondary or auxiliary pump used for brake assist or emission-related vacuum supply. The PCM monitors the commanded state of the pump and the resulting circuit voltage, and it sets this code when the voltage on the control circuit falls below the expected threshold while the pump is commanded on or off.

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.