The check engine light on my '99 V6 auto
Contour has been on for some time now.
I'm getting two error codes;
P0171-System too lean, bank 1
and
P1131-Lack of upstream heated oxygen sensor switch
The car has 94K miles on it on the original O2 sensors
and I'm tempted to just replace the sensors.
Does anyone know if there is a way to debug an O2 sensor
without an ODBII scanner?
(I know someone is going to ask how I got the codes
without a scanner. I actually got them off my last
inspection. When the inspection station saw the check
engine light they plugged a scanner into the car.
The car passed inspection but the report printed out
the codes.)
A side question, Can anyone recommend an inexpensive
ODBII scanner that works with a laptop PC?
Chenz
