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  1. V8 Engine Tech (L76/LS3)
    I've had rotofab, ARH headers, and custom VMS tune for 6months+ and no issues - now I get the following all of a sudden: P0131 - 02 Sensor circuit low voltage P0171 - system too lean (bank1) P1133 - HO2S Insufficient switching Checked rotofab closely for cracks or loose connections and...
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