P1757 verbiage is "Governor pressure above 3 PSI at 0 MPH". This circuit is continuously monitored with the engine running, not in park or neutral and the MIL not illuminated. The monitor must fail twice to illuminate the MIL. The MIL will illuminate as soon as it fails twice.
If you have any other DTCs set you need to determine their cause first as they could cause this DTC to set. Your idea of deleting the code and driving the vehicle is good because it will ensure that there is a problem, unless it's very intermittent. Based on my experience, this DTC will appear in vehicles that have not had regular transmission filter changes/flushes, in extremely cold weather or some combination of the two.
P1762 - Governor Pressure Sensor (GPS) Offset Volts Too Low Or High. This code will set if the governor pressure is out of range in Park or Neutral for 1.3 seconds. Three consecutive bad 3.0 second tests and sump temperature is greater than 50° F and less than 260° F are required to set the code.
Some of the possible causes are:
- Transmission fluid level and condition
- Powertrain Control Module
- Sensor ground circuit open
- Intermittent GPS signal
- 5 volt supply circuit open inside transmission
- GPS ground circuit open inside transmission
- Bad GPS
There is little you can do to troubleshoot the system with out a Chrysler DRB scan tool. There are some voltage and resistance tests you can do and I would suggest looking in the Motors Transmission Manual for the proper procedures. You can find the Motors Transmission Manual in the Reference Section of your local Public Libra
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