Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
What is a "fuel trim malfunction"?
I have a 1998 Mitsubishi Galant with a 2.4 liter engine. The check engine light is on and when I run an OBD2 test on it, it gives a code of PO170, fuel trim malfunction. I do all of my own repairs, but not sure what this is. Please help.
1 Answer
- 1 decade agoFavorite Answer
The code is set if a malfunction in the fuel system occurs,and the fuel compinsation value becomes too large or small. Things that can cause that are vacuum leaks incorect fuel pressure bad oxygen sensor bad bad injector any thing that can effect the air fuel mixture.
Source(s): 25 years auto tech
