Engine Performance problem
1999 Toyota Tacoma 6 cyl Two Wheel Drive Automatic 133000 miles
I want to replace the oxygen sensors that are on the PRE CATALYTIC side of the exhaust. How many PRE CAT sensors are there? I'm confused because I only see one just before the CAT CONV but some info that I have, if I'm reading it correctly, says there ARE 2 pre cat sensors, Bank 1 sensor 1 and Bank 1 sensor 2, and 2 post cat sensors. (I only see one post cat sensor just after the CAT CONV) If there are 2 PRE CAT sensors where is the other one located?
have the same problem?
Saturday, February 21st, 2009 AT 7:12 PM