the code on 2001 s10 is p0446 and it says evap emmission control system vent circuit malf the light comes on after i have been driving the vechile for 5 to 10 minutes also in my haynes repair manual its says for p0446 evap canister vent blocked and i really would like to know what the promble is so i can fix it. it gets to be a pain to keep on having to turn the service engine light off
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2001 Chevrolet S10
Question: i have a 2001 s10 and the service engine light came on and the code is p0446
Answer #1milesauto from Miles Auto Service Inc., June 06, 2012, 05:31Master
Most evaporative faults can be challenging to diagonose. Several differant issues can set that code. Requires a good knowlege of the system and a good scanner to fix. Could be cheaper in long run to take it to a shop that can fix rather than guessing at what part to replace.
Replyizzystradlian, June 06, 2012, 06:23Rookie
i have a actron obd ll pocketscan coder reader and i hooked it into data link connector and the code reader said pp0446 what is a good scanner to get and to have. the code said evap emission control system vent circuit malf
Replymilesauto, June 06, 2012, 07:12Master
A code reader may not do the funtion test to determine or pinpoint the fault. That code is for a system fault not specfic to one part. I will list some things that could be your problem.
Fuel Tank Pressure (FTP) Sensor
Fuel Filler Cap
Fuel Tank Pressure (FTP) Sensor Wiring
Evaporative Emission (EVAP) Canister Vent Control Valve
Replyizzystradlian, June 06, 2012, 07:35Rookie
where is the evaporative emission (evap) canister vent control valve and the fuel tank pressure (ftp) sensor at on my 2001 s10
Replymilesauto, June 06, 2012, 07:51Master
need to know more spoecfics...engine size
Replyizzystradlian, June 06, 2012, 08:08Rookie
its a v6. what else do u need to know
Replymilesauto, June 06, 2012, 08:44Master
Canister Vent control valve is located on frame rail above spare tire area. Fuel tank pressure sensor is attacted to fuel sender unit in top of fuel tank.
Replyizzystradlian, June 06, 2012, 09:49Rookie
how hard is it to take off and replace. i want to try to fix it myself and save myself some money
Replymilesauto, June 06, 2012, 10:26Master
Vent control valve not hard to get too after the spare tire is removed....Fuel tank pressure sensor requires removal of fuel tank or cargo body to gain access to it.
your evap system poss has a plugged vent tube or solenoid
Replyizzystradlian, June 06, 2012, 12:49Rookie
is that the one that is on top of the manifold and has a ruber line going to it and has wires hooked to it. is the tube that your talking about have a green cap on it