P1441low severityPowertrain
EVAP System Flow During Non-Purge
on 1996 Buick Century 3.3L V6 · FWD
What this code means
The PCM detected fuel vapor flow through the EVAP system when it should be sealed (non-purge condition). The PCM seals the system by commanding the Purge Solenoid OFF and the Vent Valve ON, then monitors fuel tank pressure for unexpected vacuum changes. A leaking purge solenoid valve is the most common cause.
Symptoms
- Check Engine Light
- Rough idle
- Fuel odor
- Decreased fuel efficiency
- Poor acceleration
- Difficulty starting when engine is hot
Common causes
- Defective EVAP purge control solenoid (most common)
- Defective charcoal canister
- Leaking vacuum lines in EVAP system
- Loose or damaged gas cap
- Clogged EVAP canister
- Overfilling fuel tank (damages charcoal canister on GM vehicles)
Diagnostic steps
- Test EVAP purge solenoid for leakage
- Inspect vacuum lines for cracks or disconnections
- Check gas cap seal
- Smoke test EVAP system
- Test charcoal canister for saturation
- Monitor fuel tank pressure sensor with scan tool
Repair notes
Replace EVAP purge control solenoid first (most common fix). GM charcoal canisters are susceptible to damage from fuel tank overfilling. If canister is saturated, replace it.
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