P1333 – EVAP Purge Flow Insufficient
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Symptoms
- Check engine light
- Slight rough idle
- Emissions test failure
Causes
- Stuck closed purge valve
- Blocked hose
- Charcoal canister issue
Diagnosis
- Command purge valve
- Check hose routing
- Inspect canister
Repair
- Replace purge valve
- Repair hoses
- Service canister