Having problems with your 2003 Mitsubishi Eclipse Spyder ?

I have a 2003 mitsubishi esclispe spyder gt

\015 My check engine light is on i got a front light out autozone said (po421 code )warm up catalyst below threshold\015 Posted / edited by AnonymousUser on : 20-09-2021

Answers :

Basically this means that the oxygen sensor\015\012 downstream of the catalytic converter \015\012 on bank 1 is detecting that the converter is not working as efficiently as it \015\012 should be (according to specs). It is part of the vehicle emissions system
Repair Help & Product Troubleshooting for 2003 Mitsubishi Eclipse Spyder

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