P1129 Jeep -

Question

code P1129 what do I do next

Answer 1

P1129 Closed loop fueling not achieved - Bank 2

Check the fuel pressure , the fuel pressure specification are with key on engine not running 59 psi , The coolant temperature sensor also need to be check, make sure radiator is full and the vehicle goes to operating temperature,You will also need to check for vacuum leaks escpecially at bank 2,