OBDII code PO170-Fuel trim malfunction/bank 1. Where would be a good place to start looking for the problem?

Question

1998 Mitsubishi Galant - 2.4L - Where should I start looking for the problem. I understand it could be as simple as a vacuum leak. How is the best and most economical way to check this? I would like to start with the cheapest possible repair and work up to the most expensive. Any ideas?

Anonymous · Accepted Answer

hey u said it first thing i would check is for vacum leaks cloged fuel filterlisten for a hissing noise afther that u have to find out what ur fuel trims are doing are they going lean or rich if going lean it's gettin to much gas if going right it's ot getting enuogh gas ..... based on this is where i would go next since u didnt say if fuel trim to lean or to rich

OBDII code PO170-Fuel trim malfunction/bank 1. Where would be a good place to start looking for the problem?

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