Tacoma Error Code Help

Hello Forum,

I have received the catalyst system below thresold error (Bank 1) (P0402) twice in the last 200 miles. I am going to conduct some research on the net now, any ideas? It sounds like an oxygen sensor and the truck does idle a little rough.

--
Tony
95 Toyota Tacoma 2wd
K&N FIPK Generation 2 w/ Throttle Body Spacer
Fiberglass fenders w/ 31x1050 BFG A/T KO's

One, set your newsreader to post in Plain text

Two, your bad sensor is the one after the CAT.

The sensor(s) before the CAT adjust the air/fuel mixture, and they throw a
different code. The sensor after the CAT tells you that the CAT is working
or not. Since the CAT itself has no moving parts, and is a costly repair,
the odds favor a worn/failed sensor over a defective CAT.


"Tony" <ac!ark_10@verizon.n@t> wrote in message
news:oEeng.2663$Wh.909@trnddc04...
Hello Forum,

I have received the catalyst system below thresold error (Bank 1)
(P0402) twice in the last 200 miles. I am going to conduct some research on
the net now, any ideas? It sounds like an oxygen sensor and the truck does
idle a little rough.

--
Tony
95 Toyota Tacoma 2wd
K&N FIPK Generation 2 w/ Throttle Body Spacer
Fiberglass fenders w/ 31x1050 BFG A/T KO's