primary O2, before or after cat?
Thread Starter
today is not my birthday.
Joined: Apr 2005
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From: Massachusetts
primary O2, before or after cat?
Threw code 61 for a couple of weeks, then light went off. Jumped code 61 and it's the primary O2 sensor. Is that the one before or after the cat? im guessing before but i have never had to replace it so i dunno.
