Code P0603 (KAM) anybody had this? - Ford Powerstroke Diesel Forum
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Old 05-19-2009, 05:50 AM
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Code P0603 (KAM) anybody had this?

I have code p0603 popping up at times anybody ever had this before?
P0603= Powertrain Control Module Keep Alive Memory (KAM) Error
I think this is causing my tranny to not shift right at times with the tuner intalled (bully dog GT Diesel). I uninstalled BD-GT after I call BD and got an unlock code form them because it wouldn't uninstall the tune that it had. The tech asked if the truck had been reflashed or the batteries unhooked, I told him NO. So that lead me to check for codes and thats when I found it. And also it started surging at idle last night, it acted as if it was going to die, but didn't, then went back to idling normal. It is stock as of last weekend, any help appreciated!

Thanks,
Blake
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Old 05-19-2009, 05:58 AM
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(Forgot) The truck is 2004 f250 SD FX4 6.0L eclb with only 96K on it.
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Old 05-20-2009, 04:33 AM
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So, there isn't anybody that's had this code (P0603) or lost there PCMs memory with a tuner installed that has caused the tranny to shift delayed or hunt gears? Wow I guess I am the only lucky one!

Thanks for looking at this, if you could pass it on to somebody you know that could help I would appreciate it!!!!

Blake.
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Old 05-20-2009, 05:27 AM
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Could be batteries
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Old 05-20-2009, 09:11 AM
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Do a key on engine running test, key on engine off, contribution test... check your icp voltage, fuel pressure... etc It sounds to me that your engine running issue is causing what you percieve as a transmission problem. Is it back to stock right now? If not but it back to stock
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Old 05-20-2009, 10:23 AM
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Ok, I have new batteries in the truck and have checked the cables too. So thats not it, but Thanks.
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Old 05-20-2009, 12:19 PM
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Quote:
Originally Posted by WEWILLE View Post
Do a key on engine running test, key on engine off, contribution test... check your icp voltage, fuel pressure... etc It sounds to me that your engine running issue is causing what you percieve as a transmission problem. Is it back to stock right now? If not but it back to stock
The truck is back to stock as of 5-19 . So you thank that it may be engine related problem? OK, but this is what has happened, (First time) I was playing around with the different settings on tuner. It has, stock- tow- performance- extreme and had adjusted from tow to extreme and took off from 20mph kick the truck took off fine then all of sudden the tranny didn't shift and the engine was at 4k rpm on the tach. I let off the throttle and then it shifted hard, It only did it once that was it for about three weeks. (Second Time) I was in traffic running about 40mph when the tranny started hunting gears. It rev up to 3k then you fill it shift but not hard as before then back down to about 1500rpms or so did that about four times as I was driving then it was fine! (Third Time) the same day as 2nd Time, but had traveled about 3 to 4 miles to the highway running about 55mph went to pass a car it kicked down fine (tuner was in tow). Passed car let off throttle didn't up shift, I was up to 3000rpm. Stabbed throttle twice then it shifted to 5th and was fine the rest of my trip. That freaked me out a little and wanted to check and see if it did it with the tuner uninstalled and so on. Its has been fine other then the idling thing that it did the other night. That's it and the code p0603, but it has not popped up again after the last time I cleared it. Every time this has happened the truck was up to temp not cold. I'll do the test tonight and see what I find out. THANKS for the help!!! Just wanted to see what somebody though about it too!

Thanks again!
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Old 05-20-2009, 06:03 PM
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Quote:
Originally Posted by Dieselman74 View Post
(Forgot) The truck is 2004 f250 SD FX4 6.0L eclb with only 96K on it.
that was funny!
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Old 05-21-2009, 08:06 AM
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Quote:
Originally Posted by Dieselman74 View Post
The truck is back to stock as of 5-19 . So you thank that it may be engine related problem? OK, but this is what has happened, (First time) I was playing around with the different settings on tuner. It has, stock- tow- performance- extreme and had adjusted from tow to extreme and took off from 20mph kick the truck took off fine then all of sudden the tranny didn't shift and the engine was at 4k rpm on the tach. I let off the throttle and then it shifted hard, It only did it once that was it for about three weeks. (Second Time) I was in traffic running about 40mph when the tranny started hunting gears. It rev up to 3k then you fill it shift but not hard as before then back down to about 1500rpms or so did that about four times as I was driving then it was fine! (Third Time) the same day as 2nd Time, but had traveled about 3 to 4 miles to the highway running about 55mph went to pass a car it kicked down fine (tuner was in tow). Passed car let off throttle didn't up shift, I was up to 3000rpm. Stabbed throttle twice then it shifted to 5th and was fine the rest of my trip. That freaked me out a little and wanted to check and see if it did it with the tuner uninstalled and so on. Its has been fine other then the idling thing that it did the other night. That's it and the code p0603, but it has not popped up again after the last time I cleared it. Every time this has happened the truck was up to temp not cold. I'll do the test tonight and see what I find out. THANKS for the help!!! Just wanted to see what somebody though about it too!

Thanks again!
OK, a thought crossed my mind that if the PCM loses it memory then the tranny loses its strategy as well and then the tranny needs to go through the re-learn prose again, but with the tuner installed and the extra power it shifts hard and delayed during that time till it relearns then its fine! Untill the code P0603 happens again and the memory is lost then the shifting problems happen again and it just keeps cycling again and again. So if I fix what is causing the code then the tranny will re-learn and all will be happy in tuner and tranny Land!
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Old 05-21-2009, 09:57 AM
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the trans has to relearn shift patterns? never heard that before.
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