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2002 Chevrolet Impala OBD code P0420

Tiny
BASETECH
  • MEMBER
  • 2002 CHEVROLET IMPALA
  • 3.8L
  • 2WD
  • AUTOMATIC
  • 189,000 MILES
Just had the catalytic converter replaced yesterday, and after 30 or so miles the check engine light came back on, my obd reader gave me the code of p0420, NOW what do I need to get fixed/replaced?
Sunday, March 9th, 2014 AT 1:41 PM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Take it back to where it was fixed as that is a converter code so ther eis probably an air leak prior to converter. Or an electrical issue to O2 sensor
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Tuesday, March 11th, 2014 AT 8:34 AM
Tiny
BASETECH
  • MEMBER
  • 2 POSTS
Thanks! I took it back and was told it was "most likely" my O2 sensors. Don't you love how car repair is such an exact science with these guys? Appreciate the feedback, thanks again.
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Tuesday, March 11th, 2014 AT 6:12 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Sometimes thing like that can go wrong but maybe he overlooked them.
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Wednesday, March 12th, 2014 AT 6:33 AM

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