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173 is a code for the right side o2 sensor. I have had an exhaust leak, for the last six months. Its on the right side but no code for that until after I replaced the ECT sensor.
334 is a code for the EGR sensor. I ohms tested, it's ok. It has 5 volts. I will try cleaning it next week.
Can an exhaust leak cause a code 173? Can these codes cause bad fuel mpg?
oh ya an exhaust leak will cause that code also make sure that ur egr valve isnt stuck open a bit after u clean it. and ya that will hurt the fuel millage.