I have a 2004 Chrysler 300m with a 3.5l engine and getting a 0871 and 0700 code.

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Trouble Code: P0871 (3.5L V6 VIN G Auto)
A/T O/D Pressure Switch Circuit Malfunction

Trouble Code Conditions:
Engine started; vehicle driven in a forward gear, and the PCM detected that the O/D Pressure Switch circuit indicated open or closed at the wrong time.

Possible Causes:

• Related DTCs may be present
  
• O/D pressure is incorrect, or internal transmission faults exist
  
• O/D pressure switch circuit is open, shorted to ground or power
  
• O/D pressure switch is damaged or it has failed
  
• TCM relay power circuit to O/D switch is open (loss of B+)
  
• Intermittent wiring or connector problems exist
  
• PCM or TCM has failed
  

Trouble Code Conditions:
Ignition on or engine started. The PCM received a message over the CCD Bus from the Transmission Control Module (TCM) that it had detected a problem and set a trouble code in memory.

Possible Causes:

• The presence of this code means the TCM detected a problem
  
• TCM related Sensor has solenoid is damaged or has failed
  
• This code is for information only - check for other TCM codes
  
• TCM or PCM has failed