DTC P1C10: Vacuum Pump Performance: Trouble Symptom

WARNING: This page is about a different car, the 2015 Subaru XV Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.

EV traveling/Auto Start Stop does not operate.
Vacuum pump fail lamp illuminates.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". < Ref. to CAUTION , General Description.>

DTC PROCEDURE

Step	Check	Yes	No
1 CHECK VACUUM PRESSURE. Turn the ignition switch to ON. Using the Subaru Select Monitor, perform «Brake Vacuum Pump System Check» of System Operation Check Mode for the hybrid powertrain control system. < Ref. to HYBRID POWERTRAIN CONTROL SYSTEM , OPERATION, System Operation Check Mode.>	Is the result of operation check mode OK?	Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.	Go to step 2 .
2 CHECK BRAKE VACUUM HOSE. Check the brake vacuum hose. (Check the hose for any external damage and also check that air only flows in one direction, when air is blown into or sucked from the hose.)	Is the condition normal?	Replace the brake vacuum pump. < Ref. to BRAKE VACUUM PUMP .>	Replace the brake vacuum hose. < Ref. to BRAKE VACUUM PUMP .>