OBD-II code · Powertrain (generic)
P0448 EVAP System Vent Control Circuit Shorted
EVAP vent valve drive circuit shorted to ground or B+. The vent valve seals the canister during pressure-test diagnostics.
Is it safe to drive with P0448?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyShort in drive line
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- Parts involved
- Evap Vent Valve
Related codes
- P0445Evaporative Emission System Purge Control Valve Circuit Shorted
- P0446Evaporative Emission Vent Control Circuit Malfunction
- P0447Evaporative Emission System Vent Control Circuit Open
- P0449Evaporative Emission System Vent Valve/Solenoid Circuit Malfunction
- P044AEGR Sensor C Circuit
- P044BEGR Sensor C Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.