Hello,
I have 2003 WJ 4.0. Previous owners was changed PCM. The original PCM is p56044634ae, replacement is p56041425ае.
Engine work with replacement, but after few minits on idle Trans overtemp and O/D indicators came to ON. Oil pressure on dash not working. Fuel tank level work fine, but when Trans overtemp and O/D came to ON, it goes to full.
Is the replacement PCM is compatible with my WJ?
Which PCM different from original will be compatible?

Is there are difference bitween PCM pinouts and communication from 1999/2000 PCM and newer PCM's

Can anyone help me
Thanks in advance