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Old 02-13-2004, 03:20 PM   #1
Scooby Specialist
Member#: 8179
Join Date: Jul 2001
Location: Legacy Sport Sedan (Turbo)
Question no cats and never thrown a CEL for cat inneficiency

I'm totally catless and have never had a CEL for cat inefficiency or egt temp.

I know my front o2 sensor is shot for the 4th time. Is that why I don't get the CEL...or do I have another problem?
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Old 02-13-2004, 05:34 PM   #2
Scooby Guru
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
2003 GGA MBP
12.9 / 105+



the ecu needs for both o2 sensors to be working before it can run the "test."

it also needs a host of other conditions to be met, which is why it takes a varying amount of time for the p0420 and similar to be indicated... it depends on your typical driving habits.

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Old 02-13-2004, 07:36 PM   #3
Scooby Specialist
Member#: 22554
Join Date: Aug 2002
Chapter/Region: South East
Location: Palm Coast, FL
2007 Corolla no PW!
WHITE miss my WRX :(


im catless also, but mine comes and goes. its never just gone though.
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