In that case unless the O2 sensors have been replaced they may be the issue? Totally guessing from the the HO2 front & rear reading text, if I remember correctly there are sensors close to the engine and maybe again after the catalytic converters? Perhaps the converter(s) are expired?? I’m probably not helping at all here. [emoji51]
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2010 KK Sport, LPG, Mygig, Uconnect, JBA UCAs, 3" CRDstu lift & Uneek bull bar.