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Replaced engine with re built. Also replaced thermostat, radiator, and bank 2 upstream O2 sensor?

Vehicle: 2006 Chrysler 300C 5.7L

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Hi there,

This code indicates an issue with the closed loop system on bank 2. Here is a list of possible causes. 

P1129 CHRYSLER - Closed Loop Fueling Not Achieved Bank 2

Read more: https://www.autocodes.com/p1129_chrysler.html

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