-Set DTCS (Codes) DTC P0420 Catalyst Efficiency Below Threshold (Bank 1) DTC P1469 EXCessive A/C Cycling DTC P0420 Catalyst Efficiency Below Threshold (Bank 1) DTC P1469 Excessive A/C Cycling *** ** ****k** ************************** * * ' ction * These codes indicate a maliggnts' * in certain systems or comp y * ' '5 should be * Prgggimgaggojlmechanic or through pe ' 'n the * proper diagnostics outlined i * 'cle our vehi ** al for y ****** seerEE*Til-;l:1*****~k*******-k* *******