Lexus check engine codes
Overview
Lexus shares engines with Toyota. EVAP leak codes and catalytic converter codes on high mileage vehicles are most typical.
Codes notably common on Lexus
- P0420 Catalyst System Efficiency Below Threshold (Bank 1) · Lexus notes
- P0455 Evaporative Emission System Large Leak Detected
- P0456 Evaporative Emission System Very Small Leak Detected
- P0442 Evaporative Emission System Small Leak Detected
Lexus specific notes
- Lexus shares EVAP designs with Toyota. Toyota service guidance for EVAP codes starts with a genuine cap and a smoke test.
Owner's manuals
Official Lexus owner's manual / owner portal (manufacturer site; we do not host copies).
Repair manuals
Step-by-step service manuals for Lexus with torque specs and wiring diagrams:
Haynes manuals for Lexus Chilton manuals
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Recall lookup
Check open Lexus recalls with your VIN at the NHTSA recall lookup.
Sources
- https://www.vehicleservicepros.com/tsbs/article/53091486/toyota-evap-dtcs-2012-08-21
- 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 Lexus as on any vehicle:
P0430 P0300 P0301 P0302 P0303 P0304 P0171 P0174 P0440 P0128 P0135 P0141 P0101 P0299 P2135 P0401