huesmann

I'm getting a P0650 code. The CEL was not coming on when turning the key to start, so I removed the instrument cluster and replaced the bulb. I turned the key, saw the bulb light, then buttoned everything back up, then went to drive it and the light isn't lighting up again.

I've done some searching, and same up with some diagnostics that involve a scan tool. Not sure what tool it is, but pretty sure I don't have it. What would cause a CEL bulb to burn out that fast? Any ideas?

(I'm also getting a P0410 code.)

huesmann

WTH? Now the CEL is working again! :dunno:

dadaroo

Delete those codes and let's see what comes back. If the CEL lights up again, pull your codes BEFORE you turn the engine OFF. So codes can "go away".

You will have to reset any messages on the DIC in order to read the codes.


Mr. Sam

huesmann

I had deleted the P0410 and P0650 using the DIC buttons, but they always came back. I tried using my cheapo OBD2 scanner plugged into the OBD2 port and deleted the codes that way, and they haven't come back yet (though it's only been a couple of drives).

dadaroo

That scanner may only be good for one thing, determining if the car is ready for emission testing. They will only read emission related codes and that is the only thing it can do that you cannot do from the onboard system.

The C5 has about 325 possible codes from the 11 or 12 modules in the car depending on if you have or do not have F45 or F55 Selective Suspension.

You can pull the codes from the dash.



I have more detail on this but not at home now.


Mr. Sam

huesmann

Yes, I understand that--like I said, I did read the codes before, using the onboard system. Thanks.

dadaroo

You sure did, sorry.

I just reread what you said and it is weird that that did not come back after deleting with the scanner.

huesmann

So...it looks like the CEL is working, but only on first turning of the key. That is, if I start the motor cold, it lights up. But if I turn the motor off, then turn it back on without removing the key, there's no CEL.

huesmann

That behavior does seem a little weird, but thank you for checking your own Vette to confirm that it appears to be normal!

Now I just gotta contend with the damned P0410 code...