I have the same problem. When i accelerate the cel comes on then goes off when i come to a stop. I read code 32. Took off the egr and cleaned the hell out of it. Ran throttle body cleaner in every hose and down the copper egr tube coming from the exhaust. (i even noticed the fluid leaking out of a doughnut gasket on the exhaust cross pipe) Anyway when I put it back together it ran good for a half a day and now the cel light comes back on. This is begining to suck.
I had code 32 as well as 44 and 45. after tracing the wiring for the o2 senor I found a wire that branches off of the main wire near the top of the transmission on the passanger side that had some how disconnected, plugged it back in and now the rodeo runs great with no codes. Don't know if this helps ya but it worked for me.