Question about Jeep Wrangler
Is there a o2 sensor before and after the cat
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Posted on Jan 02, 2017
i would check with the dealer who changed the converter to check and see if the sensors were damaged while they replaced the converter or may be they have forgotten to hook it back up check before you throw away your good 02 sensr
Posted on Nov 12, 2008
There are many reasons for a PO171 code, these need to be checked before replacing O2's:
Posted on Feb 10, 2009
It is probably the sensor before the cat. if it has a heater. The heater circuit going bad is a common problem, it does not affect the way the car runs after it warms up, it is an emission device to heat the O2 sensor up quicker than the hot exhaust gas would. It should be replaced because it will keep your check engine light on and you would not be able to pass an emission test.
Posted on Oct 12, 2009
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