P0448
PowertrainEvap Systemlow severityEvaporative Emission System Vent Control Circuit Shorted
What P0448 Means
The PCM detected a short to ground in the EVAP vent control valve circuit. This affects the vapor system's ability to seal and vent properly.
Symptoms
- Check engine light on
- Failed emissions test
- No driveability symptoms
Common Causes
- Shorted vent control valve
- Wiring shorted to ground
- Corroded connector
- Failed PCM driver circuit
Diagnostic Steps
- Retrieve code and freeze frame
- Inspect vent valve wiring for shorts
- Test valve resistance
- Check PCM control circuit
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✓ Autel official store
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