55 is end of message. It just means that the test is done and there are no more codes.
it is the completion of the codes
code 41 -1993 Plymouth voyager - Alternator Circuit
The code 12 on a 1996 Plymouth Voyager indicates the battery was disconnected within the last 50 key cycles. The codes 54 and 55 relate to issues with the camshaft sensor or camshaft-related components.
Code 55 is end of message ( it is done flashing codes )Code 12 is start of message or battery was disconnected.Code 55 is end of message ( it is done flashing codes )Code 12 is start of message or battery was disconnected.
Trouble code P0340 means:Camshaft position sensor circuit malfunction
The code numbers are two didgit codes. That was probably a 12 and a 55. 12 is start of message, 55 is end of message. Basically that means there are no trouble codes.
No vacuum change at the MAP sensor.
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Trouble code P1294 means: Target idle not reached
11 means begining code readout. This starts all readouts. 55 is end of readout. Other fault code readouts flash in between these two codes. 11 means begining code readout. This starts all readouts. 55 is end of readout. Fault code readouts flash in between these two codes.
Trouble code P1698 means: No CCD Messages Received From The TCM
Trouble code P1698 means: No CCD Messages Received From The TCM