Cadillac check engine codes
Overview
Cadillac uses GM engines, including V8s with cylinder deactivation and turbocharged four cylinders. EVAP faults and misfires are common reports.
Codes notably common on Cadillac
Cadillac specific notes
- A pending class action alleges lifter failures in 2014 and later GM 5.3, 6.0, and 6.2 liter V8 engines with Active or Dynamic Fuel Management, with symptoms including ticking and misfires. Treat any misfire with ticking seriously and get it inspected.
Owner's manuals
Official Cadillac owner's manual / owner portal (manufacturer site; we do not host copies).
Repair manuals
Step-by-step service manuals for Cadillac with torque specs and wiring diagrams:
Haynes manuals for Cadillac Chilton manuals
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Recall lookup
Check open Cadillac recalls with your VIN at the NHTSA recall lookup.
Sources
- https://www.gmlifterlawsuit.com/
- https://www.carcomplaints.com/news/2026/gm-lifter-lawsuit-update.shtml
- https://www.nhtsa.gov/recalls
Sources checked October 2026. Bulletins apply only to the models and years they list.
All other codes
These work the same on Cadillac as on any vehicle:
P0420 P0430 P0301 P0302 P0303 P0304 P0174 P0440 P0442 P0456 P0128 P0135 P0141 P0101 P0299 P2135 P0401