To start from the beginning. Wednesday afternoon about 1:30 The winter front came into our area with a line of severe thunder storms in the lead. To get home I had to drive through one of these rainstorms which was about three miles wide and rained an ungodly amount with a wind that literally blew me within inches of the ditch while I was driving through and the temp dropped over 20*. Sometime while I was under this storm cloud my check engine light came on. When I got to where I was out of the storm I noticed it and dropped the hammer to see if it was real. My truck shuddered and bucked at full throttle about 4 times on different settings on the quad and after the 4th time it smoothed back out and "seemingly" ran stronger than it ever had. It was fine and the light went out that afternoon until I got called out on an alarm on one of the leases and battered the truck through some mudholes that were full of freezing rain. Now the light has been on since wed. night and the transmission is acting funky;not wanting to shift right and sometimes refusing to go into overdrive unless you kill the truck and restart. This only happens when you select another gear besides drive. It is still slick, 19*, and snowy here so I haven't had a chance to get under the truck to check wires or anything but I did retrieve the codes.
One set was: P0483, P0480, P0868 flashed twice in quick succession, P0108, P0643.
The second set I pulled a little later was:P083, P0643, P0108 flashed twice also, P0480, P0107 also flashed twice, and P0868.
Any help or thoughts you guys can give me will be greatly appreciated because last time I took the truck in for tranny work it cost me $1200 and some change just in shop work for a chaffed wire.
Nick

 

bump bump bump

 

P0483 Cooling Fan Rationality Check Malfunction (fan speed)

P0480 Cooling Fan I Control Circuit Malfunction (low speed fan)

P0868 Trans Fluid Press Low

P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input

P0643 Sens Ref Voltage 1 Circuit High

P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input

Only 107 and 108 would normally activate the check engine light, so the other codes may be older codes you just never noticed.

Troble codes link

 

The P0483 code I had on my 2002, it was a bad fan relay, I had an extra one for an accessory that wasn't on my truck, so I borrowed it from an empty circuit. It was the condenser fan for the A/C, the A/C wouldn't get cold enough unless I was moving, needed air across the condenser. Remember the A/C cycles when you use defrost.

 

Don't follow this Nick. How could you get to OD when selecting any gear but drive??

Not familiar with any of those codes???

I might be temped to wait it out... until the weather gets back to normal, and see how it does. Could it be moisture got somewhere it shouldn't and needs to dry out?? Just a guess, but those were EXTREME conditions?
You say you can drive it, right?

 

Likely water in connectors, or that chafed wire(s), again - the 107 and 108 could only occur if the sensor was open, connector was unplugged, or the wire(s) loose or broken.

Same with the fan - loss of connection

Fluid level and reference - same causative

Check your harnesses for oxidation\corrosion - any deterioration.

 

thanks everybody for the replys. Rowland it does it if I manually downshift when slowing down or stoping, afterwards the torque converter won't engage correctly upon start from a dead stop and it won't shift to od or lock the converter once I get to lockup speed. I think your all correct on the moisture in the plugs or the wire. i think all the ice should be melted out from under the truck this afternoon so maybe i can get underneath it and wiggle a few connectors.
Let me know if anything else comes to mind. Thanks
Nick