P0448 SUBARU - Evaporative Emission Control System Vent Control Circuit Close
P0448 SUBARU Possible Causes
- Faulty canister vent control valve
- Purge Control Valve harness is open or shorted
- Purge Control Valve electrical circuit poor connection
First diagnose P0448 SUBARU code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
Cost of diagnosing the P0448 SUBARU code
Labor: 1.0The cost of diagnosing the P0448 SUBARU code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the P0448 SUBARU code detected?EVAP canister vent control valve remains closed under specified driving conditions.
P0448 SUBARU Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0448 Subaru DescriptionThe Evaporative Emission System (EVAP) canister vent control valve is located on the EVAP canister and is used to seal the canister vent. This solenoid (the EVAP canister vent control valve) responds to signals from the Engine Control Module (ECM). When the ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system componentsThis solenoid valve is used only for diagnosis, and usually remains opened. When the vent is closed, under normal purge conditions, the evaporative emission control system is depressurized and allows EVAP Control System (Small Leak) diagnosis.
P0448 SUBARU More InformationNeed more information on how to fix the P0448 SUBARU code?
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