P0442low severityPowertrain
EVAP System Leak Detected (Small Leak)
on 2012 Chevrolet Express 4.3L V6 Vortec · RWD
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.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1