P0171
Thread Starter
Driver
Joined: Dec 2005
Posts: 90
Likes: 2
From: CA
P0171 and huge drop in fuel efficiency
Greetings,
My Check Engine light came on yesterday. Had access to old AutoTap ODBC diagnostic gizmo which displayed a code "P0171 - System too lean bank 1 "and allowed me to clear the code. I'm sure the code will return after a few drive cycles. It is the only code coming up. I'm sure others have experienced and resolved it. Would you kindly share your approach to resolving this issue.
My Check Engine light came on yesterday. Had access to old AutoTap ODBC diagnostic gizmo which displayed a code "P0171 - System too lean bank 1 "and allowed me to clear the code. I'm sure the code will return after a few drive cycles. It is the only code coming up. I'm sure others have experienced and resolved it. Would you kindly share your approach to resolving this issue.
Last edited by rmk9785e; Oct 5, 2017 at 09:48 AM.
Racer
Joined: Oct 2009
Posts: 1,298
Likes: 324
From: nj
Thread Starter
Driver
Joined: Dec 2005
Posts: 90
Likes: 2
From: CA
Huge drop in fuel efficiency
Thank you for the informative link. Learned much about the error and its causes.
Now that I cleared the error code (without any other changes) and have been driving it for a few days, the error code has not returned so far. My fuel efficiency has dropped significantly. I used to get 16-17 mpg in city driving which is close to its official rating. Now I am getting 10-11. Please point me to where I can find information for steps to take to bring it back to normal.
Now that I cleared the error code (without any other changes) and have been driving it for a few days, the error code has not returned so far. My fuel efficiency has dropped significantly. I used to get 16-17 mpg in city driving which is close to its official rating. Now I am getting 10-11. Please point me to where I can find information for steps to take to bring it back to normal.
Thread
Thread Starter
Forum
Replies
Last Post