Hi there. Our LR3 threw a check engine light over the weekend...no recent work apart from an oil change maybe 500 miles ago. I plugged in the GAP tool and pulled faults, but no faults were found.
Then I tried checking some live values and I noticed it's not reporting oil or coolant temperature in the Live Values section (it used to.)

Anyone run into this before? Any ideas of next steps? Seems to be running fine FWIW.

Thanks!

 

If you see a check engine light, there should be a code.
Is the light still on? Try again?

 

Finally was able to pull the codes and live values after pulling the GAP tool out, starting and shutting down the truck, and then reseating the GAP tool. Looks like it's a PO420-00 (catalyst system efficiency below threshold (bank 1)) error so for now I will ignore and see if it comes back.

thanks.

 

I have had that code several times on my 2008 L322 and at least once in my 2008 LR3. I just clear it. Seems to have no effect on engine performance. I wonder what exactly triggers it? Must be something to do with the downstream O2 sensor.

 

It’s telling you your cat on that bank is not working properly.