Diagnostic Aids

WARNING: This page is about a different car, the 2016 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

This diagnostic procedure can be used to diagnose these common DTCs: U0400, U0401, U0402, U0403, U0404, U0405, U0406, U0407, U0408, U0409, U040D, U040F, U0410, U0414, U0415, U0416, U0417, U0418, U041B, U041E, U0420, U0421, U0422, U0423, U0424, U0425, U0426, U0427, U0428, U0429, U042B, U042E, U0430, U0431, U0432, U0433, U0435, U0436, U0437, U0438, U0439, U043A, U043B, U043C, U0440, U0447, U0452, U0456, U0459, U045A, U0461, U0462, U0463, U0464, U0465, U0466, U0467, U0468, U0469, U046A, U046B, U046C, U046D, U0481, U0482, U0483, U0485, U0486, U0492, U0493, U0497, U0498, U0499, U04B1, U04B5, U0507, U0508, U0513, U0514, U0515, U052A, U0532, U0533, U0534, U0536, U0537, U053B, U053C, U053D, U0546, U0549, U054B, U0551, U0555, U0558, U0563, U0564, U0565, U056B, U056E, U0585, U0586, U0588, U0594, U0595, U0596, U059B, U05A1, U05A2 and other DTCs within U0400-U05FF range.