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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
  • 109,709 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.
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Wednesday, August 26th, 2009 AT 9:45 PM

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