Question about 2002 Chevrolet Tracker
Fuel trim lean bank 1 and bank 2
TYPE: OBD PO171
Your looking for a rich condition
That is why the fuel trim is driven lean
Add short & long term trim & diagnose those numbers
The oxygen sensors get replaced on all vehicles
at 100,000 miles-that can also be the issue,if they
are slow to switch
The exhaust converter can be on it's way out
And other things as well
Best to let a shop work on finding the main issue
Need professional scan tool to look at data on a road test
Posted on May 09, 2014
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Posted on Jan 02, 2017
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