Jump to content

2000 Rx300 Loss Of Gas Mileage

TPH

By TPH
in 99 - 03 Lexus RX300

 Share

Recommended Posts

TPH Advancing

TPH

Posted
Posted

Can anyone help with a sudden loss of gas mileage in a 2000 RX300 AWD. It dropped from just below 19 MPG to 16 MPG almost over night. Have cleaned the mass airflow sensor and changed the thermostat - was heating up slowly. Any other ideas?? No trouble codes. Runs well.

  • Like 1
Link to comment
Share on other sites
lenore Grand Master

lenore

Posted
Posted

checked the usual, tire pressure, air filter, and dont forget the change in fuel from winter to summer blends....With no cel lights hard to diagnose

Link to comment
Share on other sites
TPH Advancing

TPH

Posted
  • Author
Posted

Just had the CEL come on this morning on the way to work. Code 1150. I believe this is the Air/Fuel ratio sensor on the front bank of cylinders. Bet that could make a difference in mileage. Thanks for the input have checked all the other typical culprits. Was about to remove wheels and check for dragging brakes.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
 Share
Go to topic listing


×
×
  • Create New...

Forums

News

Membership
  • Unread Content
    •
  • Members Gallery
    •