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Trouble Code


jadecuir

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The engine light stayed on the other day. I pulled the efi fuse to reset the light. No light for three days. It came back on today. Checked the code, get #25, "Air-fuel ratio lean malfunction". Anyone know what would cause this? Car runs great! No idle problems at all. Is one of my Ox sensors failing?

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Yeah, #25 is usually a bad O2 sensor...but it could be a few other things. First, test the voltage on your main O2 sensors...the procedure is on my site ;) The O2 sensors don't last forever, you do need to replace them once in a while. My bet is that one or both of your main O2 sensors have gone out of spec.

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Yeah, #25 is usually a bad O2 sensor...but it could be a few other things.  First, test the voltage on your main O2 sensors...the procedure is on my site ;)  The O2 sensors don't last forever, you do need to replace them once in a while.  My bet is that one or both of your main O2 sensors have gone out of spec.

Thanks for all your tutorials! They are the greatest!

John

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