Honda CR-V code P0240?
I had the same code (P0240) on my 2000 Honda Odessey. It kept
coming on for about six months and I kept resetting it. After
reset, it would return after about 60 miles or so of driving (or
less). On a hunch, I took a hammer, laid on the ground, and reached
under the van. I gave the catalytic converter about a dozen firm
raps with the hammer... sides, bottom, ends. Not enough to dent it
but good, solid raps. My theory was that this would shake loose
built-up soot and such inside the converter and maybe allow it to
operate again within specs. The P0240 codes has NOT returned. It's
been about six weeks now. YES!!! Nate - Toledo, OH.