Multiple fault codes but no CEL

[Neinris]

Originally Posted by 06YarisRS

Have you put a voltmeter on your alternator? With all those codes, I'm wondering if you're having voltage delivery problems. Of course, you're not having drivability problems, so maybe not.

Actually, I didn't... That's why I thought maybe my belt was slipping a bit. It passed the voltage test when I used the ODBII reader. I'll check right now.

[Neinris]

Originally Posted by Neinris

Actually, I didn't... That's why I thought maybe my belt was slipping a bit. It passed the voltage test when I used the ODBII reader. I'll check right now.

Ok, so I let her warm up to idle, took the negative cable off the battery, and read the alternator to ground, and she's making +14VDC. So that's not it...

[remcafee]

a smoke test will determine and pin point any evap sustem leaks, what you do is pinch off your rear vent by the gas tank and put the smoke tester straight into the evap system and you will see if theres smoke coming somewhere, is your car rusty? sounds like you have a lot of rust with all the bolts that are breaking. i would give your car a wd 40 bath before touching another fastener on that thing

[Neinris]

Originally Posted by remcafee

a smoke test will determine and pin point any evap sustem leaks, what you do is pinch off your rear vent by the gas tank and put the smoke tester straight into the evap system and you will see if theres smoke coming somewhere, is your car rusty? sounds like you have a lot of rust with all the bolts that are breaking. i would give your car a wd 40 bath before touching another fastener on that thing

The undercarriage is surprisingly not that rusty, but yes there are components that are, like the bolts that connected the midpipe to the header and axleback, and the bolts that held the evap canister.

I'll test my alternator first, like Adam said, if that's fine then I think I'm done messing with her and just head to the shop. Could it still be possible that my evap is fine and it's just faulting out because of electrical issues?

[remcafee]

off to the shops then...

[Neinris]

Originally Posted by remcafee

off to the shops then...

YUP! I grabbed a 2012 Corolla evap canister, the related faults didn't go way. So I'm done trouble shooting. I'll post once the shop finds the fix. Stay tuned!

[Neinris]

My apologies it took me forever to reply back. First thing's first, the ODB2 reader that my cousin had, which what I was using when I was back in San Diego was faulty. I ended up troubleshooting the false fault that it was showing, which lead to replacement of parts that didn't needed to be replaced and ended up causing an actual fault. When I got to Maryland, I used my friend's tablet type ODB2 reader and showed the actual fault.

Anyway, I actually fixed this issue a long time ago, back in August when I finally moved back to Maryland. It was the vapor purge solenoid under the hood that was causing the problem. I didn't think it was bad, because I already replaced it when I was chasing the problem. But apparently the one I bought from Auto Zone was intermittently bad, which I paid full price for, I don't even know how much it was, I think around $70. I bought one from eBay for $12 and voila!!! And no CEL ever since.