HeavyChevy11

I have had Ol' Greg since I was 16 when he had just over 100,000 miles now he sit's with 207,000ish. He is a burgundy 1999 Chevrolet Z71 Ls with the 5.3. It started on my way back to Tampa I was on I75 and my check engine light was flashing. I took it home and put on my Pro comp power pro and it came up with p0300, p0332, p0440, p0446, and p0463. I was almost back so I drove it home.
Please help!

01ssreda4

iTrader: (96)

What are those codes?

JeremyKrauss

P0300: Random/Multiple Cylinder Misfire Detected.
P0332: Knock Sensor 1 Circuit Low Input (Bank 2)
P0440: Evaporative Emission Control System Malfunction
P0446: Evaporative Emission Control System Vent Control Circuit Malfunction
P0463: Fuel Level Sensor Circuit High Input

All of these codes came up at once?

HeavyChevy11

Yes they all came up at once.

JeremyKrauss

It could be a bad PCM, that's the one thing I see in common between most of those codes. I think it unlikely that all of those would actually go wrong all at once.

HeavyChevy11

I have been looking everywhere online and cannot find where to buy one. Do you know anywhere that sells them?

JeremyKrauss

I don't know of any sponsors that would sell it...maybe contact Frost via email (steve@tunedbyfrost.com). I'll send you a PM.

I would check to be sure that the PCM is bad though before ordering anything. The dealership or a well-equipped shop would be able to figure it out. I don't know how to check. A new PCM would come unprogrammed, so keep in mind that you'll also have to spend money to get it flashed.