P0442low severityPowertrain
EVAP System Leak Detected (Small Leak)
on 2011 Audi A6 3.0L Supercharged V6 · AWD
What this code means
A small leak has been detected in the EVAP system.
Symptoms
- Check Engine Light
- Slight fuel smell possible
Common causes
- Loose gas cap
- Small crack in EVAP hose
- Faulty purge or vent valve seal
- Charcoal canister micro-crack
- Fuel tank leak
Diagnostic steps
- Tighten gas cap and clear code
- If returns, perform smoke test on EVAP system
- Inspect all EVAP hoses
- Check purge and vent valve seals
- Inspect charcoal canister
Repair notes
Check gas cap first. Small leaks often require smoke test to find.
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