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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

 

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izzystradlian, Fulton, MS, June 06, 2012, 04:39
 Rookie

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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  • Answer #1

    Miles Auto Services (884 Answers) , Richmond, VA - (804) 885-4176
    milesauto June 06, 2012, 05:31
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     Master

    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.

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    izzystradlian, June 06, 2012, 06:23
     Rookie

    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

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    milesauto, June 06, 2012, 07:12
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     Master

    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

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    izzystradlian, June 06, 2012, 07:35
     Rookie

    where is the evaporative emission (evap) canister vent control valve and the fuel tank pressure (ftp) sensor at on my 2001 s10

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    milesauto, June 06, 2012, 07:51
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     Master

    need to know more spoecfics...engine size

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    izzystradlian, June 06, 2012, 08:08
     Rookie

    its a v6. what else do u need to know

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    milesauto, June 06, 2012, 08:44
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     Master

    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.

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    izzystradlian, June 06, 2012, 09:49
     Rookie

    how hard is it to take off and replace. i want to try to fix it myself and save myself some money

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    milesauto, June 06, 2012, 10:26
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     Master

    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.

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  • Answer #2

    Greg's Orange Auto (14209 Answers) , Orange, CA - (714) 361-9386
    globalhelper June 06, 2012, 12:21
     Master

    your evap system poss has a plugged vent tube or solenoid

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    izzystradlian, June 06, 2012, 12:49
     Rookie

    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

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