P0441 : Evap. Emission System Incorrect Purge Flow
General Description
The evaporative emission control system prevents hydrocarbon (HC) vapors from the fuel tank from escaping into the atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The ECM controls the Purge Control Solenoid Valve (PCSV) to purge any collected vapors from the canister back to the engine for combustlon. This valve is actuated by the purge control signal from the PCM and controls fuel vapor from the canister to the intake manifold.
Possible Cause :
● Leakage on hose to PCSV
● Defective PCSV
PCSV Inspection
1.
Ignition "OFF"
2.
Disconnect the hose leading from the PCSV to the intake manifold at PCSV
3.
Using a vacuum pump, apply specified vacuum(Approx. 15 in, Hg) to the manifold side of the valve and verify PCSV holds vacuum.
4.
Ignition "ON" & Engine "OFF"
5.
Install scantool and select "EVAP PURGE VALVE" on the Actuation Test mode
6.
Activates "EVAP PURGE VALVE" by pressing "STRT(F1)" key
7.
Verify PCSV release vacuum while valve is activating(should hear a faint click from PCSV)
8.
Repeat this procedure 4 or 5 times to ensure PCSV reliability.
9.
Is PCSV working properly?
YES
▶ Thoroughly check fuel vapor hoses and hose clamp and replace as necessary. Go to "Terminal and connection inspection" procedure.
NO
▶ Thoroughly check fuel vapor hoses and hose clamps between PCSV and intake manifold. Repair as necessary.
If OK, test with a new PCSV and check for proper operation. If problem is corrected, replace PCSV and go to "Verification of Vehicle Repair" procedure
Terminal and Connector Inspection
1.
Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2.
Check the following conditions:
(1)
Check for damaged harness and terminals: contact resistance, oxidation, bent or broken terminals.
(2)
Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks and poor terminal to wire connection.
3.
Is a problem found?
YES
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Using a suitable male pin to ensure that contact in sockets is good. The pin should remain in position when pulled gently.
×
4,358 views
Usually answered in minutes!
Code PO441
Evap emission incorect purge flow
evap system incorrect purge flow (Stuck Open)
×