Question

I got the engine codes P1684 and P0171 on my Dodge Grand Caravan 3.8L, how do I fix it?

Answer 1

Hi there,

This is not a code to worry about, it is only there as a reference to let you know the battery was disconnected.

Note: This is not a fault code. It exists to provide reference information only. A battery backed RAM is used to maintain some learned values. When the battery is disconnected, this memory is lost. When the battery is reconnected, the loss of learned values will be detected by the controller. The code will be set and the learned values will be initialized to known constants and the learning process will continue. Setting the code has no effect except for re-initialization of learned values.

Answer 2

P1684 CHRYSLER Code - Battery Power To Module Disconnected
Read more: https://www.autocodes.com/p1684_chrysler.html

P0171 DODGE Code - Fuel System 1/1 Lean
Read more: https://www.autocodes.com/p0171_dodge.html