I have an 01 GS-430 with 120K on the clock. The past year, fuel mileage has dropped about 1 to 1.5 MPG. It might just be me, but is seems the car is a little down on power. Seems to run better after cleaning the MAF. I was wondering, with 120K, wouldn't it seem like maybe it would be in line for some sensor changes? I was thinking of getting a new MAF and changing both oxygen sensors.

Has anyone run into this? What other sensors might need to be swapped out.
Thanks.

 

I have never heard of anyone changing sensors if they are not broken. Honestly, at 120k, if you're really itching to change something, change the spark plugs if you haven't already done so. I believe on these motors that's when they're due to be changed.

Check your tire pressure, if it's low it will result in your car feeling slower and using more fuel.

 

I'm planning on changing my fuel filter this weekend. I've read that a few owners have noticed a significant increase in MPG's.

 

Plugs changed, tire pressure checked. I am not not "itching" to change anything. The fact that cleaning the MAF makes a difference leads me to believe that some of thess sensonrs actually start to fail before they start setting codes.