PO446 EVAP CONTROL SYSTEM INCORRECT PURGE FLOW 2000 CHEVY TAHOE

SOURCE: P0441 Evap control system purge flow fault

http://www.obd-codes.com/p0441
and
http://www.obd-codes.com/p0455

SOURCE: what will be the cost of part and labor for po440

If you have P-0440-P0441-P0446, you can usually trace that condition to a loose fuel cap, or a fule cap that has a bad rubber o-ring, or rust build-up where the cap's o-ring seals against, at the filler neck opening. The cap is about 15 dollars, and the replacement filler neck is about one hundred sixty dollars

SOURCE: engine light on Codes show

Hello! Those three codes commonly indicate the followi possibilities:

The gas cap was not sufficiently tightenend ater fueling, a bad gas-cap rubber o-ring, the vehicle had the key in the 'on', or engine running, or the tank was filed all of the way up the neck.

Any one of the abope causes will set all three codes.

Lodhi Autos

• 992 Answers
• Posted on Jan 11, 2014

SOURCE: P0441 EVAP Control System Incorrect Purge Flow

Error Code: P0441
Fault Location:
Evaporative Emission (EVAP) System - Incorrect Flow Detected
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
Evaporative Emission (EVAP) Canister Purge Regulator Valve faulty/jammed.
Evaporative Emission (EVAP) Canister Purge Solenoid Valve faulty/jammed.
Evaporative Emission (EVAP) Canister Sealing faulty.
Pipes between Tank Breathing and Throttle Body leaky/blocked.
Hose connection(s).
Intake leak.
Possible Solutions:
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Perform Output Test.
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve.
Check Evaporative Emission (EVAP) Canister.
Perform Basic Setting.
Check Pipes between Tank Breathing and Throttle Body.
VSV connector near air filter box disconnected.