keyboard
RAM or ROM
According to my handbook that came with my fault code reader, the P0325 fault code indicates a problem with the knock sensor.
yes, if the post find an error with the RAM, it would not boot at all and it can generate sound code beeps.
An error code P1684 from an OBDII code reader indicates that the battery had recently been disconnected. This is normal if a new battery was installed but can indicate a connection issue or grounding problem.
In the 1998 Intrepid ES, 1684 indicates a problem with the catalytic converter. It probably is the same for the 2000.
This error code indicates that the hard drive has failed and needs to be replaced
system board
it means that what ever is telling you this error code has a problem because there is no Jaguar error code P160A.
Error message on monitor
That indicates a problem with your automatic transmission.
A 503 error is a universal error code. It usually means there is a problem within the server itself, such as an overload.
If it is a 1995 200SX SE-R it should NOT give a 402 error code. Nissans up to 1995 did not report 402. 1996 to 1998, error code "0402" indicates a problem to the "Fuel temperature sensor or circuit". Check sentra.net for a list of pertinent error codes. Chris