I got codes!!

Well, first off is the engine running alright? The ECU will set a PO300 when there aren't enough misfires to pinpoint cylinder location. It detects misfires by monitoring crankshaft rotation via the crank sensor and observing at which point during the engine cycle the crankshaft is slowed by a cylinder that won't fire. PO300 is usually always set initially followed by 301, 302, or whichever cylinder it has determined is not contributing the correct amount of juice. If 300 is the only code that you have and there is no discernible rough running, than the cause could be anything from a spot of bad fuel to some dirty injectors to a coil that is starting to give. In other words, there was a momentary misfire, but not enough for the computer to determine which cylinder is at fault. The blinking light occurs when there is a misfire big enough to cause damage to the catalytic converter due to the amount of unburned hydrocarbons in the exhaust stream, and this would most definitely be caused by a misfire big enough for you to detect while driving. As far as the "command cancelled" thing, it may be an issue with your reader. Another way to clear the code is to pull the EFI fuse from the fuse block under the hood near the left fender.

"qslim" ...

Thanks q, nice explanation, I get it. My son was the one driving it when this occurred and he says that he did not notice anything different in the engine performance and I believe that he is savvy enough to notice anything that I would have noticed. There were no 301, 302... codes following.

I pulled the battery wire to reset the codes, as is my way of doing it. I just hooked it back up after about an hour.

I use an Actron 9145 scanner, a good one. I am thinking that it ought to be able to clear the codes. Anyone know about this? Thanks again, Tomes

I don't have much experience with aftermarket scanners, I was a factory guy for years. And FYI, pulling the EFI fuse for 30 seconds or so will accomplish the same thing as disconnecting the battery without resetting things like radio presets.

"qslim" ...

Oh - very cool indeed. Where is this EFI fuse? Resetting the radio is the most tedious part of that. Tomes

Pop the hood and take the lid off the fuse block that sits near the front left quarter panel, just in front of the left strut tower if I remember correctly. There should be a fuse map on the lid.

"qslim" ...

Nice. I will look at that tomorrow when I have light out there again. This is left looking at it from the driver's position or from looking at the grille? Thanks again, Tomes

Driver side of the car.