The fuel trim malfunction indicates and slightly rich or lean condition. The most likely causes on this vehicle are in order: vacuum leak, failed suction jet pump (vac check valve assembly), leak in pcv system, or failed Mass air flow sensor. A smoke test of the intake would be the first place to start. And no, it doesn't hurt the engine. It uses baby oil to make the smoke!
PO170= Bank 1, fuel trim malfunction. It could be anything. Do a preliminary check. Is there any damage underneath, pinched,damaged,leaking fuel line/s. Look at any recent service that you or the shop may have done.
Hello
When the service engine
soon light (Also called the check engine light or engine management
light) is turned on this is to alert you to the fact that Powertrain
Control Module (computer) has detected a failure somewhere in the
systems it controls you may not feel any difference in the way the
engine runs, this can be the transmission or the engine or emission
system, there are fault codes set in the modules memory for these
faults. What needs to happen now is to have the powertrain control
module scanned with a special tool called an OBD2 electronic engine
control scanner or a OBD2 code reader. Once the code(s) are read then
you must perform the diagnostics for each code and make the
appropriate repairs based on the findings of the diagnosis that was
performed, this is called doing "Pinpoint" testing.
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