I had the truck scanned today and got a couple of codes. First one is not a problem, just the P0541 AIH circuit loss from deleting the heater.

Second code is P0603, Internal Control Module KAM error, according to the code reader.
A little back story, I took the truck to the shop that built the trans last year because I experienced what I thought was converter slippage yesterday. The "tech" ( I use that term loosely) hooked up the scanner and we went for a drive. I couldn't get it to replicate what it had done the day before, either on the drive to the shop or with the scan tool hooked up. TC locked just as it should and stayed at 100% .
Not really sure how to describe what happened, but after turning off the highway onto the 2 lane I live on, I accelerated as normal, trans shifted fine through all gears and TC locked as it should. Approached a small hill and the trans downshifted from 4th to 3rd and either the TC unlocked or it was slipping. Now, this was after about 60 miles of highway driving, in near 0 temps pulling about 3K. Trans was at about 165 before all this and closer to 180 by the time I got home about 1 mile down the road. The rise in temp points to either the trans slipping or the converter, IMO. The trans seems to run 150+ when it is anything below about 20 ambient. From about 20 degrees and up, trans doesn't get above 120 at any time.

Now, not sure if this has anything to do with this or not, but had a strange issue on Monday as well. I turned off the highway on to the same road, and went to accelerate as normal and got no response from the throttle for a second or two. Then, it just took off like normal, probably was about 25% in to the throttle at the time it took off.

I'm a little lost here, not sure what to look for or where to start.

 

That code is usually associated with running a chip or programmer.

 

P0603 is nothing to worry about. That code will set whenever the PCM looses power, as when the batts are disconnected. It will always be there until the KAM (Keep Alive Memory) is cleared.

Sorry, no ideas on whether TC is operating properly or not.

 

On the fuel pedal, I would wager that the position sensor is bad or dirty. Might be worth looking to see if you can clean the sensor. I can't remember the part number but I thought someone said the sensors can be purchased seperate from the pedal...

 

I had this one too, I had my batteries disconnected to do some electrical work, and it came up the next time I AE'ed my truck. Has not come back since.

 

Thanks. I did a search on the code and found some more info on it. You guys are spot on, either from the chip or from having the batteries disconnected. Should have no bearing on the TC or any other functions.

I am now leaning toward the TPS being the suspect here. I did have the no throttle input earlier in the week and now this TC issue. So, I will be looking to see if it can be purchased separately or if I need a whole pedal assembly.

 

With the no throttle response I would think it would be the idle validation switch on the pedal assembly.

 

I'd suggest you change the title of your thread to something more along the lines with your tranny issue and hope the likes of Mark K stop by and see it. As you've discovered, P0603 is not your problem. Shoot monsterbaby a PM also. He knows a couple of things about trannys.

 

'99 to '01 may have a separate TPS that can be replaced. THIS THREAD

Part # DY-967 or F4SZ-9B989-AA - Potentiometer

 

Thanks for the responses guys.

Thank you for the link Robin, I'll check it out tomorrow after it warms up a little, supposed to be close to -20 here again tonight.

 

BRRRRRRRRRRRRRRR!!!

 

I have never seen a torque converter that slips when it should be locked with enough RPM slip that a person could detect it without a scan tool. What I think you are seeing is the torque converter unlocking. That will cause a few hundred RPM slip, which is normal. That much slip will cause the trans temp to go up. All of this is as it should be, nothing is wrong.

It does sound like you have a pedal issue.

 

Thanks for stopping in Mark.

It just baffled me. I guess it makes sense that the TC unlocked. Can't say that it has happen in this situation before, I drive this route almost daily and can't remember it happening like this before. I guess that's why I posted and had the truck scanned for codes.

Is the TC lock up somehow tied to the TPS or IVS?

I'll check out the pedal switches in a bit, started out at -24F here this AM.

 

Well, no such luck. Don't have the separate sensors on the pedal.

Going to hopefully check it with AE this weekend.

If I do need a pedal assembly, how much are they?

 

The lockup is a function of TPS and vehicle speed. If something changes with the TPS, lockup speeds will change.