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chris
Dodge Dakota
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11/17/2005
17:25:12
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 Subject: Calling all code pros =OBDII Code: P0601
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Message:
I had my 2001 R/T scanned for a check engine light and got a P0601 code. It is an "Internal Control Module Check Sum Error". While I know this has to do with the ROM, the truck runs like a raped ape.
I just bought the truck a couple of weeks back, could this be the result of a poor aftermarket tune or one of those crappy Hypertech jobbers?
I know if the PCM is fried or the ROM is fried, the truck wouldn't run... so I want to know how serious of a code this is? Is it a phantom code (similar to GMs)?
Lastly... where can I find the RPO build sheet on this truck? And can it tow roughly 4000-4500lbs with trailer brakes?
Thanks all in advance... I appreciate it!!!
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This sounds
Dodge Dakota
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11/17/2005
18:30:34
|  RE: Calling all code pros =OBDII Code: P0601
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stupid, but that code went away after replacing an O2 sensor on my truck. Believe it was the downstream one.
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chris
Dodge Dakota
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11/17/2005
22:04:07
| RE: Calling all code pros =OBDII Code: P0601
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At this point... nothing sounds stupid. This weekend I'll put the R/T in the air and scope the O2's.
Did you specifically have the P0601 code? I thought the O2 codes were different. I guess I'll keep you informed on if that works. Thanks for the reply.
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JimmyD
Dodge Dakota
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11/17/2005
22:15:59
| RE: Calling all code pros =OBDII Code: P0601
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Verbatim from my FSM CD. This is all there is on the subject of P0601:
__________________________
P0601-INTERNAL MEMORY CHECKSUM INVALID
When Monitored: With the ignition on.
Set Condition: Internal checksum for software failed, does not match calculated value.
The Powertrain Control Module is reporting internal errors, view repair to continue.
Repair:
Replace and program the Powertrain Control Module per Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
__________________________
That's it.
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