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2003 Mitsubishi Galant Check engine light on Code:P0431

Tiny
FLEXTRON
  • MEMBER
  • 2003 MITSUBISHI GALANT
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 130,000 MILES
Hi Guys,
My car was working fine when about a year ago, check engine light came on. I replaced the Bank 2 catalytic converter with an aftermarket one at an exhaust shop and the car worked fine. Never got the check engine light again. Now recently I got my fuel injectors cleaned at a shop and no major repair work. Suddenly after couple of months the light is on. I reset it and it comes back not before 3-4 weeks. My question is did the O2 sensors got burned partially in the process or is it the catalytic converter again? I doubt a catalytic converter can get bad so quickly.
Thanks in advance
Flextron
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Tuesday, November 18th, 2008 AT 10:43 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The best way to tell if the Cat is a goner is put it up on a 5 gas analysis machine, as for the Snitchers could be not switching accordingly lock on the lean side and computer trying to compensate creating too much unburned fuel in the exhaust
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Tuesday, November 18th, 2008 AT 11:09 AM

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