2003 Pontiac Vibe Catalytic Converter

Tiny
PONTIACVIBE2003
  • MEMBER
  • 2003 PONTIAC VIBE
  • 4 CYL
  • FWD
  • MANUAL
  • 114,000 MILES
I had my cats changed last year, but my check light is back on for a PO420 cat efficiency low bank 1. The mechanic says I need a heavier cat, but the muffler guy says the cats may not be the problem. What do you think?
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Tuesday, August 18th, 2009 AT 12:04 PM

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Tiny
WINEBURGER
  • MEMBER
The platinum group metals burn up excess fuel in the catalytic coverter. Scrap large gm converters are worth $75 aftermarket converters are worth $5 aftemakets have alot less platinum in them. The o2 sensor takes a readind before and after from two diffrent sensors the diffrence between those two are the efficiency. So faulty o2 sensors is less likely than a aftermarket converter
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Tuesday, August 18th, 2009 AT 12:32 PM

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