I had my SES light pop on after driving a mile or so. There were no
drivability issues so I preceded home 210 miles away with no issues.
I got into town and went to Advance Auto to get it scanned and had the
above codes DTC P0141 & P0161 O2 Sensor Heater Circuit Malfunction (bank
1 sensor 2 & bank 2 sensor 2). According to my wiring diagram they both
get power with key on from eng 1 fuse. I checked the fuse and it was
good and I was getting power to the fuse. I crawled under the truck and
disconnected the closest plug and I was getting power to the sensor. The
sensors got warm but not too warm as I could touch it without burning my
Is it unusual for both to crap out at once? Will this cause me
drivability issues such as mileage dropping? My mileage has sucked for a
while 13.5-14.5 in town since I owned it. This is the first time I had
that light come on since I owned it. My father has a 96 and his mileage
is around 16 or so. Would these sensors be a player? I thought only the
precat sensors controlled fuel flow? Thank you!