2002 Legacy GT, Three CEL's

[2point5RS_Dan]

Chasing down the last few issues on a 2002 Legacy GT Limited Sedan I picked up for 600 dollars.

Right now I have three check engine lights:

P0447 - Evaporative Emissions Control System Vent Control Circuit Open
P1400 - Fuel Tank Pressure Control Solenoid Valve Circuit Low
P1446 - Fuel Tank Sensor Control Valve Circuit Low

I've already replaced the gas cap, filler neck, and filler neck valve. Where should I go next?

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[RaceFaceXC]

Are all those valves/solenoids on the pump assy?

[jts749]

you are looking for either a broken wire or a bad evap solenoid, not a vacuum leak.

[2point5RS_Dan]

Originally Posted by jts749

you are looking for either a broken wire or a bad evap solenoid, not a vacuum leak.

Should I be looking by the charcoal box? Pulling my rear seat? Looking in the engine bay?

[J.Gibbs]

Id check your purge valve or see if any of the lines going to it are clogged

[scarney1988]

Hey I could be wrong, but I believe an inoperative Purge valve would yield, atleast, an incorrect purge flow code. You have 3 circuit low codes all centered around the evap system, which would point to a discontinuity in one ore more of the evap solenoid/sensor circuits. I would first inspect all hoses which go between the charcoal canister, and I would also inspect the wires and inspect the electrical connectors aswell. You may have to cut away wire conduit to do this. If a visual inspection of the evap system does not yield results, post back and we'lll help you move forward.

Also, please provide any other information about the car that you can. Why was it only 600?

Above all, good luck

[J.Gibbs]

Originally Posted by scarney1988

Hey I could be wrong, but I believe an inoperative Purge valve would yield, atleast, an incorrect purge flow code. You have 3 circuit low codes all centered around the evap system, which would point to a discontinuity in one ore more of the evap solenoid/sensor circuits. I would first inspect all hoses which go between the charcoal canister, and I would also inspect the wires and inspect the electrical connectors aswell. You may have to cut away wire conduit to do this. If a visual inspection of the evap system does not yield results, post back and we'lll help you move forward.

Also, please provide any other information about the car that you can. Why was it only 600?

Above all, good luck

Seen them many times throw random codes. Evap systems are fun to troubleshoot. Best thing is to really take a good look at everything before you start throwing parts at it

[scarney1988]

I agree completely. Although, this raises yet another question. Does the OP have the proper equipment to test these components? Ide make sure I hade my Vacuum pistol tester, DMM, and EWD, at the least. I just hate typing out all kinds of troubleshoot advice to find out the person has zero equipment and is unwilling to purchase/borrow equipment to follow said advice. If the OP is only looking for best guess's than please state so explicetly.

[2point5RS_Dan]

Thanks scarney1988

I'll be doing an inspection of what you suggested, all the evap hoses and wires.

I do not have the proper equipment to test evap things, just an obd2 scanner.

I'm looking to narrow it down to see where I should be looking for hoses, wires, and sensors before I give up and outsource it to a shop. Was hoping it'd be something obvious and someone would go, "oh yeah its this, part #xxxxxx"; but it's never that easy.

Car was 600 dollars because it had a dead motor and body rust. Bottom end ate itself.

[2point5RS_Dan]

http://legacygt.com/forums/showthrea...html?p=3525354

http://www.fixya.com/cars/t9000864-3...ing_p0447_code

Sounding like those links describe my issue. Corroded wires near the charcoal box. Going to cut the looms open and check the connectors tomorrow.

[J.Gibbs]

Originally Posted by 2point5RS_Dan

http://legacygt.com/forums/showthrea...html?p=3525354

http://www.fixya.com/cars/t9000864-3...ing_p0447_code

Sounding like those links describe my issue. Corroded wires near the charcoal box. Going to cut the looms open and check the connectors tomorrow.

Good reading. The second link goes along with me pointing you to the canister purge valve or solenoid (whatever you want to call it). The PO of my car had it replaced already along with the wiring that was messed up. It's a common problem