Question about 1996 Oldsmobile Aurora
WONT START NOW , CHECK FOR CODES FOUND P0603 , PCM MEMORY RESET
You May need to Use The Old Ignition Lock & Key ,Due to the Chip In the Key.
The PCM has a memory area where it stores certain data it needs to save when the key is turned OFF. This area is called Keep Alive Memory. This diagnostic test monitors the PCM's keep alive memory for a loss or unintended change of data. If such a condition occurs, DTC P0603 will set.
Conditions for Setting the DTC
Keep alive memory checksum does not match previous checksum.
Action Taken When the DTC Sets
If the battery has been disconnected for any reason DTC P0603 will set. The PCM keeps a running check on the memory; if memory changes it resets. An intermittent loss of power or ground to the PCM will cause a reset.
Posted on Feb 07, 2009
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