2014 dodge avenger sxt v6 went into limp mode so I had the solenoid to the transmission changed, did a relearn on it, it goes through all the gears, disengages in drive and wont go forward but drives in reverse good. I put a code reader on it and code p0871 kept coming up. Does anyone know what could be causing this and how to fix it?

 

What causes the P0871 code?

The P0871 code has a number of common causes:

• Low transmission fluid
• Faulty transmission high pressure pump
• Broken or dirty transmission temperature sensor
• Slipping or malfunctioning transmission
• Faulty powertrain control module
• Overheating engine