There are a total of 4 oxygen sensors on your truck, 2 in front of the convertor
and 2 past the convertor. an o2 sensor measure's the fuel/air mixture then sends
a signal back to your trucks computer or ecm- electronic control module. so that
the fuel mixture can be adjusted to give you better power and gas mileage. check
for locations by starting at engine and working your way back on the exhaust, it will
look like a short narrow tube with 2 wires attached embedded on your exhaust pipes.
good luck!
Where did you see that a code said to change something?
Codes are usually sensors reporting an out of range condition
& setting an OBD Malfunction Check Light
You have to component test all sensors,or any system or part & it has to
fail a test, or it doesn't get replaced.
When you get codes your best & really only choice, is to purchase
the Factory Powertrain Control / Emissions Manual,so you can
follow trouble charts. Any other approach is waste of time, as you
have no knowledge of the system your about to work on.
If you plan on working on your own vehicles, you need all the manuals,
several hundred dollars worth, for each vehicle you own.
Can't work on something you know nothing about,need reference
material,the pros have that with the Alldata System, they spend a few
thousand a year on
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