There's only one way. Put a known good PCM in and see if it works better.
No, the years have to match.
If the Neon's are both the same year and have the same engine type then the PCM should swap out ok. If the engines are different then the PCM may not work properly.
The PCM on a 2003 Neon is between the radiator and the transmission under the hood.
Need a 1996-1999 Wiring diagram for PCM for dodge neon
PCM internal failure.PCM internal failure.
You can not. It is a one time program.
under the hood driver side above wheel well.
Power train Control Module. It is the engine computer.
the Pcm is located to the front right of the engine compartment under the washer fill tube and to the right of the battery
The timing is controlled by the PCM, there is no adjustable setting.
under hood front to the left of the radiator (on drivers side)
PCM internal processor failure.PCM internal processor failure.