P0446 emision contrl code - Colorado Chevrolet Cars & Trucks

P0446 is a code for the EVAP vent valve . This part is under the vehicle near the fuel tank , not on the fire wall . That is the purge valve .
P0446 Ford EVAP System Vent Control Circuit
Repair Ford Escape P0446 EVAP Vent Problem

P0446 Evaporative Emission Control System Vent Control Circuit Malfunction. The code P0446 is set when the engine computer recognizes a fault or restriction at the vent control part of the Evaporative emission control system (EVAP).

https://www.obd-codes.com/p0446

Evaporative Emission Control System Vent Control Circuit Malfunction

the following links can assist you with problem
https://www.obd-codes.com/p0446 P0446 OBD II Trouble Code p0446 Yahoo Video Search Results

P0446Evaporative Emission (EVAP) Vent System Performance=ECM, PCM

U1153 Loss of Communications with HVAC

Generally in google search type obd2 then po446 or whatever and an obd2 site will come up w specifics for that code. Vehicle specific generally doesnt matter. http://www.obd-codes.com/p0446 typing odb2 before the code is important to find the right site. Refer to link for specifics or search using that format I suggested.

Please select the link below to further research this particular issue.http://www.gmtruckclub.com/forum/showthread.php/18964-Quick-fix-for-code-p0446-evap-emissions-vent-circuit-low.
orhttp://www.google.com/#hl=en&sugexp=pfwl&cp=42&gs_id=1v&xhr=t&q=+code+p0446+on+a+2001+cheve+silverado+1500&pq=code+p0446+chevy&pf=p&sclient=psy-ab&source=hp&pbx=1&oq=+code+p0446+on+a+2001+cheve+silverado+1500&aq=f&aqi=&aql=&gs_sm=&gs_upl=&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=37320e696dd5b6f0&biw=1360&bih=603&bs=1

Please let me know if you need further assistance. From what I have read from these sites it is a valve or a sensor.

first check ur gas cap if wasnt put on correctly ,left off ,or does not seal usually sets off one of the evap codes--if cap looks good than need to check vent valve possible faulty and the wiring circuit for damage or short -also check vent valve for blockage

po442 is evap emission control system leak (small) 1 of the lines for emissions is leaking. po455 is-- emission control system leak (large). turn off light with code scanner after it is fixed.

how did you fix your p0446 code?

Hi, check out this article, it's detailed on what to check: http://www.obd-codes.com/p0446