P1348 – EVAP System Vacuum Too High
Want to confirm the real cause of this fault code?
A high‑quality OBD2 scanner gives you live data, fuel trims, sensor readings and freeze‑frame information — exactly what you need to verify the root cause of this code with confidence.
Symptoms
- Check engine light
- Hissing at fuel cap
Causes
- Blocked vent valve
- Restricted canister
- Stuck purge valve
Diagnosis
- Check vent valve
- Inspect canister
- Read vacuum data
Repair
- Replace vent valve
- Service canister
- Replace purge valve