ECU P2138 problems?

just searched to see if this was a major or minor problem. apparently, extremely rare. anyheww, whilst working from 830am to 830pm my 04 titan sat in the parking lot at work exposed to 8-9 hours of rain showers, hail and strong winds. no big deal, automobiles are exposed to this type of occasionally and built to withstand all these types of elements. well, when i got off work, got to my titan and started it up. right off the bat, i knew something wasn't right, just a certain weird sound i heard when i started it. then the SES light illuminates almost blinding me. thought great, wtf??? anyheww, drove off and traversed about 2 miles when all of a sudden there's no throttle response. i would step on the gas and the beast wouldn't go. i'd keep giving it gas and it would slowly, and i mean slowly, accelerate as if i were in slow motion. so i pull over and think WTF??? shut the engine off, give it about 15 seconds just for the "f" of it to see what would happen. started her back up, SES light still solid, but throttle response returned. accelerated off and continued on my journey home after a long strenuous day at work and in the rain for almost 12 hours. was driving normally for another 2 miles, if that, came to a stoplight. light turned green went to accelerate and nothing, but kept gassing it and again, the rpms would slowly creep up and the truck would move, ever so slowly. ARGGHHH, WTF!!!!!!! shut her off again, waited another 15 seconds just for the... and started her back up... voila, throttle response back to normal... drove another 2 miles and again, throttle response would disappear. NEVER has this happened to me. anyheww, managed to crawl home and left the beast at home till the next day, today. after work drove the wife's truck to the autozone and got me one of them nifty lil OBDII scanners. read the code, pulled a P2138 and said, "huh?" who knows wtf that is, other than having something to do with the accelerator or some mumbo jumbo crap. stored the code, then erased it and took her for a test drive. for 20 minutes all seemed good, could not recreate the weirdness that had taken place the night before. for some strange reason i attribute the strong winds, blistering rain and hail we had to whatever caused my truck to temporarily go haywire. i'll give it a go for longer stretches tomorrow but she ran strong after i simply erased the code, so we'll see tomorrow. wish me luck... [email protected] codes!!! if this keeps up, gonna just drop a GM 502 crate motor in and be done with this Jap motor!!! LOL!!!

So my first trip with my 5th wheel started out rough due to this code. 40 miles into a 400 mile trip climbing a 5% grade and all of a sudden no throttle response. Pull over and do all the normal stuff, including unhooking the battery to try and help the situation. SES light on solid and in gear truck would pull at 7 mph at 1500 rpm. So I call the Nissan dealer I bought my 05 from and they have no clue. I was fortunate enough to have a guy I know come and flat tow me off an exit ramp to his shop a few miles away. Mind you, his 09F-350 had to pull my T, and 27' 5th fully loaded! Which it did at 50 mph with no issues! So I have done a bit more research to find that it appears my accelerator pedal sensor has failed and will be a week to get. Has anyone else experienced anything excluding the above mentioned with this? Pedal assembly is $240, the throttle body is $690. My diagnosis, based on ressitance test to the pedal and talking with a Nissan tech leads me to the pedal. Thanks