Cadillac CTS owners have reported 1 problem related to catalytic convertor (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Cadillac CTS based on all problems reported for the CTS.
Emission test failure. 2004 Cadillac Cts. 875 miles on odometer just picked up from dealer brought back following day for inspection sticker,would not pass emissions test. Told by dealer vehicle had blocked catalytic converter and need replacement.
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