The MIL is on in the LR3, and this is the code. I can clear it and it comes back after a couple of drives. What is the likely cause for the V8 LR3? I have the Hawkeye tool and by viewing the live EMS data it seems the MAF is putting out smooth readings, and the O2 sensors all match each other in output. (i.e. upstream bank 1 matches upstream bank 2 and the same for the downstream sensors.) What is up? Car seem to be running fine, fuel economy seems slightly lower than it should be.