P3999 Code

[Art Vigil]

Per Dave Lucas' OBDII reader (thanks again Dave) my vehicle is throwing this code along with the code P0430 twice.
We reset it on Saturday and they came back again. I had Autozone pull the codes today and got P0430 then P3999 then P0430 again.
I can look up P0430 on Spanish Trail's website but cannot find P3999 anywhere.

Does anyone know what this applies to?

Thanks,

[artm]

Is this code permanent or temporary. My OBDII reader sometimes shows this but it is temporary and always pending, not actual.

I always thought it was a "glitch" code, nothing to worry about.

[Art Vigil]

Art, I think you're right.
In searching the web I located your post to the LRX BB about a year ago and one other (Motorcars LTD forum). I posted the question there and got this response:

"From what I gathered from the manufacturer, this code is an internal code caused by the tester, usually due to wrong connecting/reset."


Weird, maybe it's somehow tied to the other code.
Anyway, thanks for the reply.

Regards,

[Keith Dean]

so did replacing the O2 Senosr correct the P0430 Code + Catalyst Efficiency Low Fault Bank B

[rover4x4]

Its a code for BUY ANOTHER OBDI D-90