Gas Cap vs Chk Eng Lite

That's true, but OBD II is not manufacturer specific so the fact that the truck in my driveway is a Toyota shouldn't present any differences, especially in the common codes.

I just did a quick check of that link, and it appears to say the same thing that I have been saying.

The codes are standardized, that is all codes that start with P0 are standardized. If a car can make a Code P01234, then P01234 means the same on all cars that make it. Some cars can't make a P01234, but this doesn't matter. That is, it doesn't matter what a P01234 is if the car can't make it. If the P01234 meant the DooHicky was toast, then all cars with a DooHicky would throw a P01234 when the DooHicky went belly up. If the car hasn't got a DooHicky, then it will never throw a P01234. (BTW, I pulled P01234 out of thin air to illustrate the point, it does not mean that the DooHicky has gone belly up and I don't know or care what it really means.)

A few Fords and Mazdas have some sort of unique DooHicky, and they might throw a P11234, and the description of the code would then tell you if you if the error was in a Ford or a Mazda. In the P1xxxx code, the 1 means it is a manufacturer specific code, some lists define it as an Enhanced code. There are just a few of these unique codes, and if there is the same code number for two different manufacturers then you can see the specific definition in this link,

All I wanted you to do was look at the link that you gave us, and go to where P0440 should be. You would notice that the Evaporative Emissions Control System Malfunction is listed as a P0439, which is used twice in a row. This is an obvious error, and is nothing more than a typo, and isn't even your typo so you don't need to defend it.

Hey there Bill,

I just accelerated the light erase process by popping the battery cable off.. Interesting info that you mention though !

Marc