2004 Chrysler Pacifica 3.5L with engine code P0121

Question

I have a 2004 Chrysler Pacifica 3.5L motor that idles up & down and P0121 comes up it has a new TPS. What do I do 2 test 4 causes?

Answer 1

P0121 Throttle position sensor #1 performance

P2066  Fuel gauge high or low

For P2066 This requires a flash by reprogramming the PCM (powertrain control moduel),with new software.this is for the dealer to do as you will need the authorization modification label. This is for TSB # 18-032-04. As for P0121 when the RPM goes up and down search for any false air that will interrupt the desire RPM.,P0121 is also associated with the MAP sensor So vacuum leaks can affect and cause this code to appear.

Answer 2

P0121 Chrysler Code - Throttle Position Sensor 1 Performance
Read more: https://www.autocodes.com/p0121_chrysler.html

P2066 Chrysler Code - Fuel Level Sensor 'B' Performance
Read more: https://www.autocodes.com/p2066_chrysler.html