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P1129 Diagnostic Trouble Code Discussion for December 2013

Closed Loop Fueling Not Achieved (Bank 2)

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Trouble Ticket Help Requests for DTC P1129
Help Request Posted
2008 Jeep Grand Cherokee Laredo 3.7L MIL Lamp on VIN: 1J8GR48K18
P1129: closed loop fueling not acheived bank 2. hey jeep tech's wondering if u could shed some light on these codes on this jeep, she went to a shop and they scanned it and told her she needed three of the 4 o2's..so anyway she brought it to my shop and i went ahead and got all 4 of them since the dealer o2...
December 30, 2013