SPONSORED LINKS

2003 Mitsubishi Eclipse

Tiny
BLUE ANGEL
  • MEMBER
  • 2003 MITSUBISHI ECLIPSE
Engine Performance problem
2003 Mitsubishi Eclipse 4 cyl Front Wheel Drive Automatic

It has a code po171, system too lean bank 1 what do I replace to fix this
Wednesday, August 26th, 2009 AT 9:11 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,179 POSTS
It sounds like you have a vaccuum leak. Listen for a sucking sound, try to locate it then repair it. Most likley a hose loose. If no problems are found, I would move to the O2 sensor for bank 1. However, I do feel it is a vacum leak.

Let me know what you find.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, August 26th, 2009 AT 9:45 PM

Please login or register to post a reply.

Related Engine Lean Content

How To Fix an Engine Backfire
VIDEO
How To Fix an Engine Backfire
Instructional repair video
Lean Exhaust
GUIDE
Lean Exhaust
Common Misconception: When an engine misfires, the cylinder runs lean, not rich, this is because the air to fuel ratio favors air by 14x. Therefore, an engine must be...
VIEW MORE

Sponsored links