Having problems with your 2001 Toyota Corolla ?

2001 Toyota corolla hesitates on acceleration

\015 The check engine light comes on. The code PO171 Lean on bank one\015\012I cleaned the MAF sensor and put injector cleaning fluid in the gas tank to no avail.I am stumped.\015 Posted / edited by AnonymousUser on : 27-01-2020

Answers :

Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust).
Also a bad o2 sensor at bank 1 if its running fine that's where id start.
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