catalytic converter

2002 TOYOTA SIENNA
135,000 MILES • 6 CYL • 4WD • MANUAL
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MILDRED COTTO
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  • 1 POST
i just repair my car a week ago i installed the catalytic converter and the engine light back on. the code was po420. what you think i can do?
Jul 5, 2016 at 8:52 AM
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HMAC300
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  • 48,601 POSTS
the code has to be removed with a scanner if that is the problem. it can be an air leak as well in front of converter or the O2 sensor may be bad.
Jul 5, 2016 at 9:24 AM