2008 1500 constant P1133 code
#1
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I have a 08 1500 with 4.8 and keep having the engine light come on. I have replaced bank 1, sensor 1 twice and then moved it to bank 2 and I still get P1133. I had it in the shop and no lean/ rich problems were found nor were any vacuum leaks found. Has anyone had this issue and any possible fixes??