Check engine light?

I just bought a 02 Tacoma with a 3.4. The check engine light has been on. I have a written statement from previous owners mechanic saying its 2 sensors? Would this cause my motor to run different or not to its fulliest potential? My friend said this would happen with the light on.

Thanks
Chris

 

Thanks!

 

If there are sensors that are not working it is very likely that the engine isn't running exactaly right. May not hurt you in the short term...but why messa round with it??

Go to an Autozone or Advance Auto parts and have them read the codes. Post them up and you'll be able to get alot more info (like cost of parts, ease or cost of repair labor)

 

Seems like my MPG's are low. Thinking it could be related to sensor lights

 

Sounds like o2 sensors. Just a guess if runs pretty much normal & since no codes posted.

 

Most Likely Afr sensor and o2 sensor, Been there done that. correct me if I'm wrong, if those sensor are bad doesn't our trucks go to a default loop or something like that, and it runs on a given set of numbers?

 

Im giong to figure out exactly what sensors it is. Does the default loop affect the engine?

 

yea when a o2 sensor is bad or if u dont run cats and dont have a chip to make the ecu think you have cats your truck will go into a limp mode. it wont hurt the engine just will give u less power and poor mpg.