Cadillac Code Malfunction
This bulletin applies to 2015-2018 Cadillac Escalade and 2016-2018 CTS-V vehicles. The SES lamp may be on, setting knock sensor DTC P0333 when shifting the transmission from Park. This DTC can be set due to voltage from the transmission park/neutral signal 1 circuit bleeding into the knock sensor system circuits. If routine diagnostics do not isolate the issue, inspect the K20 ECM connector X2, looking for debris, connector and/or terminal concerns.
About the Author
Mike Mavrigian
Motor Age Editor
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
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