code 91 found and fixed

bensttype

New Member
Aug 17, 2004
13
0
0
sd, ca
just wanted to let everyone know that I scanned my car with my otc 2000 monitor and up came code 91. I went to autozone and they gave me a print out of the possibilities (2 pages long) Well, I changed the driver's side o2 sensor, cleared the codes, and no more check engine light!! Oh, and I changed the pass side 02 as well, I'm not sure if this was needed, but why not start off with both of them being new.
 
o2 sensors suck that's for sure, some hpipes "aftermarket" don't let enough of the sensor stick out & screws up mixtures, my o2's kept leaning my car out but I cut the pipe so more went in & that worked so, I'd unplug em if I hadn't already bought new ones.
 
glad to hear you got it whipped. you did good - if one lambda was on the way out, the other could not have been far behind.

again, nice work!