It's an 02 GTP 40 Anniversary. 85,000 miles. Wbody fender intake,3.5 pulley, 160 Stat, Autolite copper plugs, Catless down pipe, PCM with sensor after cat delete, wbody standard flash.trans cooler, Polly upper mounts. Larger SC tensioner. Code 1133 is HO2S Bank 1 sensor 1,It determines that front 02 did not switch enough times. It monitors heated oxygen, PCM determines if front sensor is functioning properly by counting the number of ho2s lean/ rich rich/lean