Code PO446

OUTSIDER947

MEMBER
2002 SATURN SL1
150,000 MILES

Got the code and cant get rid of it, replaced canister vent solenoid and still light comes on, do I need to replace the canister purge valve solenoid to get rid of this code. Thanks as I am stumped on theis, and thanks for your help.

Thursday, February 9th, 2012 AT 9:31 PM

4 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Go to this link: http://www.obd-codes.com/p0446

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Thursday, February 9th, 2012 AT 9:33 PM

KHLOW2008

MECHANIC
41,814 POSTS

PCM uses fuel tank pressure sensor to detect vacuum decay of EVAP vent solenoid diagnostic.
Ensure fuel pressure sensor is not skewed.
Using scan tool, check fuel tank pressure sensor voltage. Sensor voltage should be 1.3-1.7 volts with ignition on and fuel cap removed.
Check for blocked or stuck EVAP vent solenoid valve.
Check for plugged, kinked or pinched vent hose.
Check for restricted EVAP canister.

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Thursday, February 9th, 2012 AT 9:45 PM

SATURNTECH9

MECHANIC
30,869 POSTS

Just to add to this one to read the fuel tank pressure sensor you will need a scan tool not code reader that can read live engine data and that can display the fuel tank pressure ssnsor voltage.I would see what that voltage reads for the fuel tank sensor.

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Thursday, February 9th, 2012 AT 11:25 PM

OUTSIDER947

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2 POSTS

Ok where do I get this scan tool as I am not familiar with this. Is this a repair garage item or dealer item? Also there is no kink in line and fuses are good. Can I hook my volt meter to the incoming wires with ignition to acc to see if I am getting juice? Also replaced the evap canister and solenoid. Thanks again.

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Friday, February 10th, 2012 AT 1:34 PM